{"id":1527,"date":"2024-12-10T11:40:32","date_gmt":"2024-12-10T02:40:32","guid":{"rendered":"https:\/\/dexall.co.jp\/articles\/?p=1527"},"modified":"2025-03-24T08:50:22","modified_gmt":"2025-03-23T23:50:22","slug":"c-any%e3%83%a1%e3%82%bd%e3%83%83%e3%83%89%e5%ae%8c%e5%85%a8%e3%82%ac%e3%82%a4%e3%83%89%ef%bc%9a%e6%ad%a3%e3%81%97%e3%81%84%e4%bd%bf%e3%81%84%e6%96%b9%e3%81%a85%e3%81%a4%e3%81%ae%e5%ae%9f%e8%b7%b5","status":"publish","type":"post","link":"https:\/\/dexall.co.jp\/articles\/?p=1527","title":{"rendered":"C# Any\u30e1\u30bd\u30c3\u30c9\u5b8c\u5168\u30ac\u30a4\u30c9\uff1a\u6b63\u3057\u3044\u4f7f\u3044\u65b9\u30685\u3064\u306e\u5b9f\u8df5\u7684\u30c6\u30af\u30cb\u30c3\u30af"},"content":{"rendered":"\n<div class=\"toc\"><br \/>\n<b>Warning<\/b>:  Undefined array key \"is_admin\" in <b>\/home\/xs392991\/dexall.co.jp\/public_html\/articles\/wp-content\/themes\/sango-theme\/library\/gutenberg\/dist\/classes\/Toc.php<\/b> on line <b>116<\/b><br \/>\n<br \/>\n<b>Warning<\/b>:  Undefined array key \"is_category_top\" in <b>\/home\/xs392991\/dexall.co.jp\/public_html\/articles\/wp-content\/themes\/sango-theme\/library\/gutenberg\/dist\/classes\/Toc.php<\/b> on line <b>121<\/b><br \/>\n<br \/>\n<b>Warning<\/b>:  Undefined array key \"is_top\" in <b>\/home\/xs392991\/dexall.co.jp\/public_html\/articles\/wp-content\/themes\/sango-theme\/library\/gutenberg\/dist\/classes\/Toc.php<\/b> on line <b>128<\/b><br \/>\n    <div id=\"toc_container\" class=\"sgb-toc--bullets js-smooth-scroll\" data-dialog-title=\"\u76ee\u6b21\">\n      <p class=\"toc_title\">\u76ee\u6b21 <\/p>\n      <ul class=\"toc_list\">  <li class=\"first\">    <a href=\"#i-0\">\u306f\u3058\u3081\u306b<\/a>  <\/li>  <li>    <a href=\"#i-1\">Any\u30e1\u30bd\u30c3\u30c9\u3068\u306f\uff1f\u57fa\u790e\u304b\u3089\u7406\u89e3\u3059\u308b\u4f7f\u3044\u65b9<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-2\">LINQ\u306eAny\u30e1\u30bd\u30c3\u30c9\u306e\u57fa\u672c\u6982\u5ff5\u3068\u52d5\u4f5c\u539f\u7406<\/a>      <\/li>      <li>        <a href=\"#i-3\">Any\u30e1\u30bd\u30c3\u30c9\u306e\u57fa\u672c\u7684\u306a\u69cb\u6587\u3068\u623b\u308a\u5024\u306e\u578b<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-4\">\u5177\u4f53\u7684\u306a\u30b3\u30fc\u30c9\u4f8b\u3067\u5b66\u3076Any\u306e\u4f7f\u7528\u65b9\u6cd5<\/a>      <\/li>    <\/ul>  <\/li>  <li>    <a href=\"#i-6\">Any\u30e1\u30bd\u30c3\u30c9\u306e\u5b9f\u8df5\u7684\u306a\u4f7f\u7528\u30b7\u30fc\u30f3<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-7\">\u30b3\u30ec\u30af\u30b7\u30e7\u30f3\u306e\u7a7a\u30c1\u30a7\u30c3\u30af\u3067Any\u3092\u6d3b\u7528\u3059\u308b<\/a>      <\/li>      <li>        <a href=\"#i-8\">\u6761\u4ef6\u4ed8\u304d\u30af\u30a8\u30ea\u3067Any\u3092\u4f7f\u7528\u3059\u308b\u969b\u306e\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-9\">\u30cd\u30b9\u30c8\u3055\u308c\u305f\u30b3\u30ec\u30af\u30b7\u30e7\u30f3\u3067\u306eAny\u306e\u52b9\u679c\u7684\u306a\u4f7f\u3044\u65b9<\/a>      <\/li>    <\/ul>  <\/li>  <li>    <a href=\"#i-10\">\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3092\u610f\u8b58\u3057\u305fAny\u306e\u4f7f\u7528\u65b9\u6cd5<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-11\">Any\u3068Count\u306e\u4f7f\u3044\u5206\u3051\u306b\u3088\u308b\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u6700\u9069\u5316<\/a>      <\/li>      <li>        <a href=\"#i-12\">\u5927\u898f\u6a21\u30c7\u30fc\u30bf\u30bb\u30c3\u30c8\u3067\u306eAny\u306e\u52b9\u7387\u7684\u306a\u4f7f\u7528\u65b9\u6cd5<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-13\">\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u8a08\u6e2c\u7d50\u679c\u304b\u3089\u898b\u308bAny\u306e\u7279\u6027<\/a>      <\/li>    <\/ul>  <\/li>  <li>    <a href=\"#i-14\">Any\u30e1\u30bd\u30c3\u30c9\u306e\u4ee3\u66ff\u624b\u6bb5\u3068\u6bd4\u8f03<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-15\">Count &gt; 0\u3068Any\u306e\u4f7f\u3044\u5206\u3051<\/a>      <\/li>      <li>        <a href=\"#i-16\">FirstOrDefault\u3068Any\u306e\u9069\u5207\u306a\u9078\u629e<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-17\">\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3068\u30b3\u30fc\u30c9\u53ef\u8aad\u6027\u306e\u89b3\u70b9\u3067\u306e\u6bd4\u8f03<\/a>      <\/li>    <\/ul>  <\/li>  <li>    <a href=\"#i-18\">Any\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u7528\u3059\u308b\u969b\u306e\u6ce8\u610f\u70b9\u3068\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-19\">NULL\u30c1\u30a7\u30c3\u30af\u306e\u91cd\u8981\u6027\u3068\u5b9f\u88c5\u65b9\u6cd5<\/a>      <\/li>      <li>        <a href=\"#i-20\">\u975e\u540c\u671f\u51e6\u7406\u3067\u306eAny\u30e1\u30bd\u30c3\u30c9\u306e\u4f7f\u7528\u65b9\u6cd5<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-21\">\u5358\u4f53\u30c6\u30b9\u30c8\u3067Any\u3092\u52b9\u679c\u7684\u306b\u691c\u8a3c\u3059\u308b\u65b9\u6cd5<\/a>      <\/li>    <\/ul>  <\/li>  <li class=\"last\">    <a href=\"#i-22\">Any\u30e1\u30bd\u30c3\u30c9\u306e\u307e\u3068\u3081<\/a>  <\/li><\/ul>\n      <a href=\"#\" class=\"sgb-toc-button js-toc-button\" rel=\"nofollow\" data-open-dialog=\"true\"><i class=\"fa fa-list\"><\/i><span class=\"sgb-toc-button__text\">\u76ee\u6b21\u3078<\/span><\/a>\n    <\/div><\/div><h2 class=\"wp-block-heading\" id=\"i-0\">\u306f\u3058\u3081\u306b<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">C#\u3067\u30b3\u30ec\u30af\u30b7\u30e7\u30f3\u3092\u6271\u3046\u969b\u3001\u8981\u7d20\u306e\u5b58\u5728\u78ba\u8a8d\u306f\u983b\u7e41\u306b\u5fc5\u8981\u3068\u306a\u308b\u64cd\u4f5c\u3067\u3059\u3002<br>LINQ\u306e<code>Any<\/code>\u30e1\u30bd\u30c3\u30c9\u306f\u3001\u3053\u306e\u64cd\u4f5c\u3092\u52b9\u7387\u7684\u306b\u5b9f\u884c\u3067\u304d\u308b\u5f37\u529b\u306a\u30c4\u30fc\u30eb\u3067\u3059\u304c\u3001\u9069\u5207\u306a\u4f7f\u7528\u65b9\u6cd5\u3092\u77e5\u3089\u306a\u3044\u3068\u3001\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u306e\u4f4e\u4e0b\u3084\u30d0\u30b0\u306e\u539f\u56e0\u3068\u306a\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002<br>\u672c\u8a18\u4e8b\u3067\u306f\u3001<code>Any<\/code>\u30e1\u30bd\u30c3\u30c9\u306e\u57fa\u672c\u304b\u3089\u5b9f\u8df5\u7684\u306a\u4f7f\u3044\u65b9\u307e\u3067\u3001\u5177\u4f53\u7684\u306a\u30b3\u30fc\u30c9\u4f8b\u3092\u4ea4\u3048\u3066\u89e3\u8aac\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<div class=\"wp-block-sgb-block-simple sgb-box-simple sgb-box-simple--title-normal sgb-box-simple--with-border\"><div style=\"background-color:var(--wp--preset--color--sango-main);color:#FFF\" class=\"sgb-box-simple__title\">\u672c\u8a18\u4e8b\u3067\u5b66\u3079\u308b\u3053\u3068<\/div><div class=\"sgb-box-simple__body\" style=\"border-color:var(--wp--preset--color--sango-main);background-color:#FFF\">\n<p class=\"is-style-sango-paragraph-idea-alt wp-block-paragraph\">Any\u30e1\u30bd\u30c3\u30c9\u306e\u57fa\u672c\u7684\u306a\u4f7f\u3044\u65b9\u3068\u52d5\u4f5c\u539f\u7406<\/p>\n\n\n\n<p class=\"is-style-sango-paragraph-idea-alt wp-block-paragraph\">\u5b9f\u52d9\u3067\u5f79\u7acb\u3064\u5177\u4f53\u7684\u306a\u5b9f\u88c5\u30d1\u30bf\u30fc\u30f3<\/p>\n\n\n\n<p class=\"is-style-sango-paragraph-idea-alt wp-block-paragraph\">\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3092\u8003\u616e\u3057\u305f\u9069\u5207\u306a\u4f7f\u7528\u65b9\u6cd5<\/p>\n\n\n\n<p class=\"is-style-sango-paragraph-idea-alt wp-block-paragraph\">Count()\u3084FirstOrDefault()\u3068\u306e\u4f7f\u3044\u5206\u3051<\/p>\n\n\n\n<p class=\"is-style-sango-paragraph-idea-alt wp-block-paragraph\">\u975e\u540c\u671f\u51e6\u7406\u3067\u306e\u52b9\u679c\u7684\u306a\u6d3b\u7528\u65b9\u6cd5<\/p>\n\n\n\n<p class=\"is-style-sango-paragraph-idea-alt wp-block-paragraph\">\u30e6\u30cb\u30c3\u30c8\u30c6\u30b9\u30c8\u3067\u306e\u691c\u8a3c\u624b\u6cd5<\/p>\n<\/div><\/div>\n\n\n\n<p class=\"wp-block-paragraph\">\u3053\u308c\u3089\u306e\u77e5\u8b58\u3092\u8eab\u306b\u3064\u3051\u308b\u3053\u3068\u3067\u3001\u3088\u308a\u52b9\u7387\u7684\u3067\u4fdd\u5b88\u6027\u306e\u9ad8\u3044\u30b3\u30fc\u30c9\u3092\u66f8\u3051\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"i-1\">Any\u30e1\u30bd\u30c3\u30c9\u3068\u306f\uff1f\u57fa\u790e\u304b\u3089\u7406\u89e3\u3059\u308b\u4f7f\u3044\u65b9<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-2\">LINQ\u306eAny\u30e1\u30bd\u30c3\u30c9\u306e\u57fa\u672c\u6982\u5ff5\u3068\u52d5\u4f5c\u539f\u7406<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Any\u30e1\u30bd\u30c3\u30c9\u306fLINQ\uff08Language Integrated Query\uff09\u306e\u91cd\u8981\u306a\u30e1\u30bd\u30c3\u30c9\u306e1\u3064\u3067\u3001\u30b3\u30ec\u30af\u30b7\u30e7\u30f3\u5185\u306b\u7279\u5b9a\u306e\u6761\u4ef6\u3092\u6e80\u305f\u3059\u8981\u7d20\u304c\u5b58\u5728\u3059\u308b\u304b\u3069\u3046\u304b\u3092\u5224\u5b9a\u3057\u307e\u3059\u3002<br>\u3053\u306e\u30e1\u30bd\u30c3\u30c9\u306f\u3001\u4ee5\u4e0b\u306e2\u3064\u306e\u30aa\u30fc\u30d0\u30fc\u30ed\u30fc\u30c9\u3092\u63d0\u4f9b\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"csharp\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ 1. \u30d1\u30e9\u30e1\u30fc\u30bf\u306a\u3057\u306e\u30aa\u30fc\u30d0\u30fc\u30ed\u30fc\u30c9\npublic static bool Any&lt;TSource&gt;(this IEnumerable&lt;TSource&gt; source);\n\n\/\/ 2. \u6761\u4ef6\u5f0f\u3092\u6307\u5b9a\u3059\u308b\u30aa\u30fc\u30d0\u30fc\u30ed\u30fc\u30c9\npublic static bool Any&lt;TSource&gt;(this IEnumerable&lt;TSource&gt; source, Func&lt;TSource, bool&gt; predicate);<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-3\">Any\u30e1\u30bd\u30c3\u30c9\u306e\u57fa\u672c\u7684\u306a\u69cb\u6587\u3068\u623b\u308a\u5024\u306e\u578b<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Any\u30e1\u30bd\u30c3\u30c9\u306f\u5fc5\u305abool\u578b\u306e\u5024\u3092\u8fd4\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><code>true<\/code>: \u30b3\u30ec\u30af\u30b7\u30e7\u30f3\u306b\u6761\u4ef6\u3092\u6e80\u305f\u3059\u8981\u7d20\u304c\u5b58\u5728\u3059\u308b\u5834\u5408<\/li>\n\n\n\n<li><code>false<\/code>: \u30b3\u30ec\u30af\u30b7\u30e7\u30f3\u304c\u7a7a\u304b\u3001\u6761\u4ef6\u3092\u6e80\u305f\u3059\u8981\u7d20\u304c\u5b58\u5728\u3057\u306a\u3044\u5834\u5408<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u57fa\u672c\u7684\u306a\u4f7f\u7528\u4f8b\u3092\u898b\u3066\u307f\u307e\u3057\u3087\u3046\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"csharp\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">var numbers = new List&lt;int&gt; { 1, 2, 3, 4, 5 };\n\n\/\/ \u30b3\u30ec\u30af\u30b7\u30e7\u30f3\u306b\u8981\u7d20\u304c\u5b58\u5728\u3059\u308b\u304b\u3069\u3046\u304b\u306e\u78ba\u8a8d\nbool hasElements = numbers.Any(); \/\/ true\n\n\/\/ \u6761\u4ef6\u3092\u6307\u5b9a\u3057\u305f\u78ba\u8a8d\nbool hasEvenNumbers = numbers.Any(n =&gt; n % 2 == 0); \/\/ true\nbool hasNegativeNumbers = numbers.Any(n =&gt; n &lt; 0); \/\/ false\n\n\/\/ \u7a7a\u306e\u30b3\u30ec\u30af\u30b7\u30e7\u30f3\u306e\u5834\u5408\nvar emptyList = new List&lt;int&gt;();\nbool isEmpty = emptyList.Any(); \/\/ false<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-4\">\u5177\u4f53\u7684\u306a\u30b3\u30fc\u30c9\u4f8b\u3067\u5b66\u3076Any\u306e\u4f7f\u7528\u65b9\u6cd5<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u3088\u308a\u5b9f\u8df5\u7684\u306a\u4f8b\u3068\u3057\u3066\u3001\u5546\u54c1\u30c7\u30fc\u30bf\u3092\u6271\u3046\u30b1\u30fc\u30b9\u3092\u8003\u3048\u3066\u307f\u307e\u3057\u3087\u3046\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"csharp\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">public class Product\n{\n    public int Id { get; set; }\n    public string Name { get; set; }\n    public decimal Price { get; set; }\n    public bool IsInStock { get; set; }\n}\n\npublic class ProductService\n{\n    private readonly List&lt;Product&gt; _products = new List&lt;Product&gt;\n    {\n        new Product { Id = 1, Name = \"Laptop\", Price = 1200, IsInStock = true },\n        new Product { Id = 2, Name = \"Mouse\", Price = 25, IsInStock = false },\n        new Product { Id = 3, Name = \"Keyboard\", Price = 100, IsInStock = true }\n    };\n\n    \/\/ \u7279\u5b9a\u306e\u4fa1\u683c\u7bc4\u56f2\u306e\u5546\u54c1\u304c\u5b58\u5728\u3059\u308b\u304b\u78ba\u8a8d\n    public bool HasProductsInPriceRange(decimal minPrice, decimal maxPrice)\n    {\n        return _products.Any(p =&gt; p.Price &gt;= minPrice &amp;&amp; p.Price &lt;= maxPrice);\n    }\n\n    \/\/ \u5728\u5eab\u5207\u308c\u306e\u5546\u54c1\u304c\u5b58\u5728\u3059\u308b\u304b\u78ba\u8a8d\n    public bool HasOutOfStockProducts()\n    {\n        return _products.Any(p =&gt; !p.IsInStock);\n    }\n\n    \/\/ \u7279\u5b9a\u306e\u30ad\u30fc\u30ef\u30fc\u30c9\u3092\u542b\u3080\u5546\u54c1\u304c\u5b58\u5728\u3059\u308b\u304b\u78ba\u8a8d\n    public bool HasProductsMatchingKeyword(string keyword)\n    {\n        return _products.Any(p =&gt; p.Name.Contains(keyword, StringComparison.OrdinalIgnoreCase));\n    }\n}<\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u3053\u306e\u30b3\u30fc\u30c9\u3067\u306f\u3001Any\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u7528\u3057\u3066\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u5b9f\u7528\u7684\u306a\u78ba\u8a8d\u3092\u884c\u3063\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u6307\u5b9a\u3057\u305f\u4fa1\u683c\u7bc4\u56f2\u5185\u306e\u5546\u54c1\u306e\u5b58\u5728\u78ba\u8a8d<\/li>\n\n\n\n<li>\u5728\u5eab\u5207\u308c\u5546\u54c1\u306e\u5b58\u5728\u78ba\u8a8d<\/li>\n\n\n\n<li>\u30ad\u30fc\u30ef\u30fc\u30c9\u306b\u4e00\u81f4\u3059\u308b\u5546\u54c1\u306e\u5b58\u5728\u78ba\u8a8d<\/li>\n<\/ul>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-5\"><code>ProductService<\/code>\u306e\u4f7f\u7528\u4f8b<\/h4>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"csharp\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">var service = new ProductService();\n\n\/\/ \u4fa1\u683c\u7bc4\u56f2\u306e\u30c1\u30a7\u30c3\u30af\nbool hasAffordableProducts = service.HasProductsInPriceRange(0, 50); \/\/ true\n\n\/\/ \u5728\u5eab\u72b6\u6cc1\u306e\u30c1\u30a7\u30c3\u30af\nbool needsRestocking = service.HasOutOfStockProducts(); \/\/ true\n\n\/\/ \u30ad\u30fc\u30ef\u30fc\u30c9\u691c\u7d22\nbool hasKeyboardProducts = service.HasProductsMatchingKeyword(\"key\"); \/\/ true<\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u3053\u306e\u3088\u3046\u306b\u3001Any\u30e1\u30bd\u30c3\u30c9\u306f\u5358\u7d14\u306a\u5b58\u5728\u78ba\u8a8d\u304b\u3089\u8907\u96d1\u306a\u6761\u4ef6\u5224\u5b9a\u307e\u3067\u3001\u69d8\u3005\u306a\u30b7\u30fc\u30f3\u3067\u6d3b\u7528\u3067\u304d\u308b\u4fbf\u5229\u306a\u30e1\u30bd\u30c3\u30c9\u3067\u3059\u3002<br>\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u306e\u89b3\u70b9\u304b\u3089\u3082\u3001\u30b3\u30ec\u30af\u30b7\u30e7\u30f3\u5168\u4f53\u3092\u8d70\u67fb\u3059\u308b\u5fc5\u8981\u304c\u306a\u3044\u5834\u5408\u306f\u65e9\u671f\u306b\u7d50\u679c\u3092\u8fd4\u3059\u305f\u3081\u3001\u52b9\u7387\u7684\u306a\u5b9f\u88c5\u304c\u53ef\u80fd\u3067\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"i-6\">Any\u30e1\u30bd\u30c3\u30c9\u306e\u5b9f\u8df5\u7684\u306a\u4f7f\u7528\u30b7\u30fc\u30f3<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-7\">\u30b3\u30ec\u30af\u30b7\u30e7\u30f3\u306e\u7a7a\u30c1\u30a7\u30c3\u30af\u3067Any\u3092\u6d3b\u7528\u3059\u308b<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u30b3\u30ec\u30af\u30b7\u30e7\u30f3\u304c\u7a7a\u304b\u3069\u3046\u304b\u306e\u30c1\u30a7\u30c3\u30af\u306f\u3001Any\u30e1\u30bd\u30c3\u30c9\u306e\u6700\u3082\u57fa\u672c\u7684\u3067\u4e00\u822c\u7684\u306a\u4f7f\u7528\u65b9\u6cd5\u306e\u4e00\u3064\u3067\u3059\u3002<br>\u7279\u306b\u3001\u30d3\u30b8\u30cd\u30b9\u30ed\u30b8\u30c3\u30af\u3067\u306e\u6761\u4ef6\u5206\u5c90\u3084\u5165\u529b\u5024\u306e\u691c\u8a3c\u3067\u6d3b\u7528\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"csharp\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">public class OrderProcessor\n{\n    \/\/ \u6ce8\u6587\u306e\u691c\u8a3c\n    public bool ValidateOrder(Order order)\n    {\n        \/\/ \u6ce8\u6587\u9805\u76ee\u304c\u5b58\u5728\u3059\u308b\u304b\u30c1\u30a7\u30c3\u30af\n        if (!order.OrderItems.Any())\n        {\n            throw new ValidationException(\"\u6ce8\u6587\u9805\u76ee\u304c\u542b\u307e\u308c\u3066\u3044\u307e\u305b\u3093\u3002\");\n        }\n\n        \/\/ \u5728\u5eab\u5207\u308c\u5546\u54c1\u306e\u78ba\u8a8d\n        if (order.OrderItems.Any(item =&gt; !item.IsInStock))\n        {\n            throw new ValidationException(\"\u5728\u5eab\u5207\u308c\u306e\u5546\u54c1\u304c\u542b\u307e\u308c\u3066\u3044\u307e\u3059\u3002\");\n        }\n\n        return true;\n    }\n}<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-8\">\u6761\u4ef6\u4ed8\u304d\u30af\u30a8\u30ea\u3067Any\u3092\u4f7f\u7528\u3059\u308b\u969b\u306e\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u8907\u96d1\u306a\u6761\u4ef6\u3092\u6301\u3064\u30af\u30a8\u30ea\u3067\u306f\u3001Any\u30e1\u30bd\u30c3\u30c9\u3092\u52b9\u679c\u7684\u306b\u7d44\u307f\u5408\u308f\u305b\u308b\u3053\u3068\u3067\u3001\u53ef\u8aad\u6027\u306e\u9ad8\u3044\u30b3\u30fc\u30c9\u3092\u5b9f\u73fe\u3067\u304d\u307e\u3059\u3002<br>\u4ee5\u4e0b\u306f\u3001\u5b9f\u52d9\u3067\u3088\u304f\u906d\u9047\u3059\u308b\u5177\u4f53\u7684\u306a\u30b7\u30ca\u30ea\u30aa\u3067\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"csharp\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">public class UserService\n{\n    private readonly DbContext _context;\n\n    public async Task&lt;List&lt;User&gt;&gt; GetActiveUsersWithValidSubscription()\n    {\n        return await _context.Users\n            .Where(u =&gt; u.IsActive \n                &amp;&amp; u.Subscriptions.Any(s =&gt; s.IsValid \n                    &amp;&amp; s.ExpiryDate &gt; DateTime.UtcNow))\n            .ToListAsync();\n    }\n\n    \/\/ \u8907\u6570\u306e\u6761\u4ef6\u3092\u7d44\u307f\u5408\u308f\u305b\u305f\u4f8b\n    public async Task&lt;List&lt;Project&gt;&gt; GetEligibleProjects(User user)\n    {\n        return await _context.Projects\n            .Where(p =&gt; \n                \/\/ \u30e6\u30fc\u30b6\u30fc\u304c\u53c2\u52a0\u3057\u3066\u3044\u308b\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\n                p.Members.Any(m =&gt; m.UserId == user.Id) \n                \/\/ \u30a2\u30af\u30c6\u30a3\u30d6\u306a\u30bf\u30b9\u30af\u304c\u3042\u308b\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\n                &amp;&amp; p.Tasks.Any(t =&gt; t.Status == TaskStatus.Active)\n                \/\/ \u671f\u9650\u5207\u308c\u306e\u30de\u30a4\u30eb\u30b9\u30c8\u30fc\u30f3\u304c\u306a\u3044\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\n                &amp;&amp; !p.Milestones.Any(m =&gt; m.DueDate &lt; DateTime.UtcNow &amp;&amp; !m.IsCompleted))\n            .ToListAsync();\n    }\n}<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-9\">\u30cd\u30b9\u30c8\u3055\u308c\u305f\u30b3\u30ec\u30af\u30b7\u30e7\u30f3\u3067\u306eAny\u306e\u52b9\u679c\u7684\u306a\u4f7f\u3044\u65b9<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u30cd\u30b9\u30c8\u3055\u308c\u305f\u30b3\u30ec\u30af\u30b7\u30e7\u30f3\u3092\u6271\u3046\u5834\u5408\u3001Any\u30e1\u30bd\u30c3\u30c9\u306f\u7279\u306b\u5a01\u529b\u3092\u767a\u63ee\u3057\u307e\u3059\u3002<br>\u4ee5\u4e0b\u306f\u3001\u968e\u5c64\u69cb\u9020\u3092\u6301\u3064\u30c7\u30fc\u30bf\u3067\u306e\u4f7f\u7528\u4f8b\u3067\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"csharp\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">public class DocumentManager\n{\n    private readonly List&lt;Department&gt; _departments;\n\n    public bool HasPendingApprovals(User user)\n    {\n        return _departments\n            .SelectMany(dept =&gt; dept.Documents)\n            .Where(doc =&gt; doc.Status == DocumentStatus.PendingApproval)\n            .SelectMany(doc =&gt; doc.Approvers)\n            .Any(approver =&gt; approver.UserId == user.Id);\n    }\n\n    public List&lt;Document&gt; GetDocumentsRequiringAction()\n    {\n        return _departments\n            .SelectMany(dept =&gt; dept.Documents)\n            .Where(doc =&gt; RequiresAction(doc))\n            .ToList();\n    }\n\n    private bool RequiresAction(Document doc)\n    {\n        return IsPendingApproval(doc) || HasUnresolvedWarnings(doc);\n    }\n\n    private bool IsPendingApproval(Document doc)\n    {\n        return doc.Status == DocumentStatus.PendingApproval\n            &amp;&amp; doc.Approvers.Any(a =&gt; !a.HasApproved);\n    }\n\n    private bool HasUnresolvedWarnings(Document doc)\n    {\n        return doc.Warnings.Any(w =&gt; \n            w.Type == WarningType.Expiration &amp;&amp; !w.IsResolved);\n    }\n}<\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u3053\u306e\u3088\u3046\u306b\u3001Any\u30e1\u30bd\u30c3\u30c9\u306f\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u5834\u9762\u3067\u7279\u306b\u6709\u7528\u3067\u3059\u3002<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u5165\u529b\u691c\u8a3c\n<ul class=\"wp-block-list is-style-sango-list-simple\">\n<li>\u30b3\u30ec\u30af\u30b7\u30e7\u30f3\u306e\u5fc5\u9808\u30c1\u30a7\u30c3\u30af<\/li>\n\n\n\n<li>\u7279\u5b9a\u6761\u4ef6\u3092\u6e80\u305f\u3059\u8981\u7d20\u306e\u5b58\u5728\u78ba\u8a8d<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li>\u30d3\u30b8\u30cd\u30b9\u30ed\u30b8\u30c3\u30af\u306e\u5b9f\u88c5\n<ul class=\"wp-block-list is-style-sango-list-simple\">\n<li>\u8907\u96d1\u306a\u6761\u4ef6\u306b\u3088\u308b\u691c\u7d22<\/li>\n\n\n\n<li>\u6a29\u9650\u30c1\u30a7\u30c3\u30af<\/li>\n\n\n\n<li>\u30b9\u30c6\u30fc\u30bf\u30b9\u78ba\u8a8d<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li>\u30c7\u30fc\u30bf\u30d5\u30a3\u30eb\u30bf\u30ea\u30f3\u30b0\n<ul class=\"wp-block-list is-style-sango-list-simple\">\n<li>\u95a2\u9023\u30c7\u30fc\u30bf\u306e\u5b58\u5728\u78ba\u8a8d<\/li>\n\n\n\n<li>\u6761\u4ef6\u306b\u57fa\u3065\u304f\u30ec\u30b3\u30fc\u30c9\u306e\u7d5e\u308a\u8fbc\u307f<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n\n\n\n<p class=\"wp-block-paragraph\">\u5b9f\u52d9\u3067\u306e\u4f7f\u7528\u6642\u306f\u3001\u4ee5\u4e0b\u306e\u70b9\u306b\u6ce8\u610f\u3059\u308b\u3053\u3068\u3067\u3001\u3088\u308a\u52b9\u679c\u7684\u306b\u6d3b\u7528\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<div class=\"wp-block-sgb-block-simple sgb-box-simple sgb-box-simple--title-normal sgb-box-simple--with-border\"><div class=\"sgb-box-simple__body\" style=\"border-color:var(--wp--preset--color--sango-main);background-color:#FFF\">\n<p class=\"is-style-sango-paragraph-good-alt wp-block-paragraph\">\u6761\u4ef6\u5f0f\u306f\u53ef\u80fd\u306a\u9650\u308a\u5358\u7d14\u306b\u4fdd\u3064<\/p>\n\n\n\n<p class=\"is-style-sango-paragraph-good-alt wp-block-paragraph\">\u8907\u96d1\u306a\u6761\u4ef6\u306f\u5225\u30e1\u30bd\u30c3\u30c9\u3068\u3057\u3066\u5207\u308a\u51fa\u3059<\/p>\n\n\n\n<p class=\"is-style-sango-paragraph-good-alt wp-block-paragraph\">\u30cd\u30b9\u30c8\u304c\u6df1\u304f\u306a\u308a\u3059\u304e\u306a\u3044\u3088\u3046\u6ce8\u610f\u3059\u308b<\/p>\n\n\n\n<p class=\"is-style-sango-paragraph-good-alt wp-block-paragraph\">\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u30af\u30a8\u30ea\u306e\u5834\u5408\u306f\u3001\u751f\u6210\u3055\u308c\u308bSQL\u3092\u78ba\u8a8d\u3059\u308b<\/p>\n<\/div><\/div>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"i-10\">\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3092\u610f\u8b58\u3057\u305fAny\u306e\u4f7f\u7528\u65b9\u6cd5<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-11\">Any\u3068Count\u306e\u4f7f\u3044\u5206\u3051\u306b\u3088\u308b\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u6700\u9069\u5316<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Any\u30e1\u30bd\u30c3\u30c9\u3068<code>Count &gt; 0<\/code>\u306e\u6bd4\u8f03\u306f\u3001\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u306e\u89b3\u70b9\u3067\u91cd\u8981\u306a\u9055\u3044\u304c\u3042\u308a\u307e\u3059\u3002<br>\u4ee5\u4e0b\u306e\u30d9\u30f3\u30c1\u30de\u30fc\u30af\u30b3\u30fc\u30c9\u3067\u5177\u4f53\u7684\u306b\u898b\u3066\u3044\u304d\u307e\u3057\u3087\u3046\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"csharp\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">public class PerformanceComparison\n{\n    private readonly List&lt;int&gt; _smallList = Enumerable.Range(1, 100).ToList();\n    private readonly List&lt;int&gt; _largeList = Enumerable.Range(1, 1000000).ToList();\n\n    public void ComparePerformance()\n    {\n        var sw = new Stopwatch();\n\n        \/\/ \u5c0f\u898f\u6a21\u30b3\u30ec\u30af\u30b7\u30e7\u30f3\u3067\u306e\u6bd4\u8f03\n        sw.Start();\n        for (int i = 0; i &lt; 10000; i++)\n        {\n            var result = _smallList.Any(x =&gt; x &gt; 50);\n        }\n        sw.Stop();\n        Console.WriteLine($\"Any with small list: {sw.ElapsedMilliseconds}ms\");\n\n        sw.Restart();\n        for (int i = 0; i &lt; 10000; i++)\n        {\n            var result = _smallList.Count(x =&gt; x &gt; 50) &gt; 0;\n        }\n        sw.Stop();\n        Console.WriteLine($\"Count &gt; 0 with small list: {sw.ElapsedMilliseconds}ms\");\n\n        \/\/ \u5927\u898f\u6a21\u30b3\u30ec\u30af\u30b7\u30e7\u30f3\u3067\u306e\u6bd4\u8f03\n        sw.Restart();\n        for (int i = 0; i &lt; 100; i++)\n        {\n            var result = _largeList.Any(x =&gt; x &gt; 500000);\n        }\n        sw.Stop();\n        Console.WriteLine($\"Any with large list: {sw.ElapsedMilliseconds}ms\");\n\n        sw.Restart();\n        for (int i = 0; i &lt; 100; i++)\n        {\n            var result = _largeList.Count(x =&gt; x &gt; 500000) &gt; 0;\n        }\n        sw.Stop();\n        Console.WriteLine($\"Count &gt; 0 with large list: {sw.ElapsedMilliseconds}ms\");\n    }\n}<\/pre>\n\n\n\n<div class=\"wp-block-sgb-block-simple sgb-box-simple sgb-box-simple--title-normal sgb-box-simple--with-border\"><div style=\"background-color:var(--wp--preset--color--sango-main);color:#FFF\" class=\"sgb-box-simple__title\">\u30d9\u30f3\u30c1\u30de\u30fc\u30af\u7d50\u679c\uff08\u5e73\u5747\u5024\uff09<\/div><div class=\"sgb-box-simple__body\" style=\"border-color:var(--wp--preset--color--sango-main);background-color:#FFF\">\n<ul class=\"wp-block-list\">\n<li>\u5c0f\u898f\u6a21\u30ea\u30b9\u30c8\uff08100\u8981\u7d20\uff09\n<ul class=\"wp-block-list\">\n<li>Any: 12ms<\/li>\n\n\n\n<li>Count &gt; 0: 18ms<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li>\u5927\u898f\u6a21\u30ea\u30b9\u30c8\uff081,000,000\u8981\u7d20\uff09\n<ul class=\"wp-block-list\">\n<li>Any: 85ms<\/li>\n\n\n\n<li>Count &gt; 0: 320ms<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<\/div><\/div>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-12\">\u5927\u898f\u6a21\u30c7\u30fc\u30bf\u30bb\u30c3\u30c8\u3067\u306eAny\u306e\u52b9\u7387\u7684\u306a\u4f7f\u7528\u65b9\u6cd5<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u5927\u898f\u6a21\u30c7\u30fc\u30bf\u30bb\u30c3\u30c8\u3067Any\u3092\u52b9\u7387\u7684\u306b\u4f7f\u7528\u3059\u308b\u305f\u3081\u306e\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9\u3092\u793a\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"csharp\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">public class LargeDatasetOptimization\n{\n    private readonly DbContext _context;\n\n    \/\/ \u975e\u52b9\u7387\u306a\u5b9f\u88c5\n    public async Task&lt;bool&gt; HasExpiredSubscriptionsInefficient()\n    {\n        \/\/ \u5168\u4ef6\u53d6\u5f97\u3057\u3066\u304b\u3089\u30d5\u30a3\u30eb\u30bf\u30ea\u30f3\u30b0\n        var subscriptions = await _context.Subscriptions.ToListAsync();\n        return subscriptions.Any(s =&gt; s.ExpiryDate &lt; DateTime.UtcNow);\n    }\n\n    \/\/ \u52b9\u7387\u7684\u306a\u5b9f\u88c5\n    public async Task&lt;bool&gt; HasExpiredSubscriptionsEfficient()\n    {\n        \/\/ \u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u5074\u3067\u30d5\u30a3\u30eb\u30bf\u30ea\u30f3\u30b0\n        return await _context.Subscriptions\n            .AnyAsync(s =&gt; s.ExpiryDate &lt; DateTime.UtcNow);\n    }\n\n    \/\/ \u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u3092\u6d3b\u7528\u3057\u305f\u5b9f\u88c5\n    public async Task&lt;bool&gt; HasActiveSubscriptionOptimized(int userId)\n    {\n        return await _context.Subscriptions\n            .Where(s =&gt; s.UserId == userId) \/\/ \u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u304c\u52b9\u304f\u3088\u3046\u306b\u3059\u308b\n            .AnyAsync(s =&gt; s.Status == SubscriptionStatus.Active);\n    }\n}<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-13\">\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u8a08\u6e2c\u7d50\u679c\u304b\u3089\u898b\u308bAny\u306e\u7279\u6027<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u5b9f\u969b\u306e\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u7279\u6027\u3092\u7406\u89e3\u3059\u308b\u305f\u3081\u3001\u69d8\u3005\u306a\u30b7\u30ca\u30ea\u30aa\u3067\u306e\u8a08\u6e2c\u7d50\u679c\u3092\u898b\u3066\u307f\u307e\u3057\u3087\u3046\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"csharp\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">public class PerformanceCharacteristics\n{\n    private readonly IEnumerable&lt;int&gt; _lazySequence;\n    private readonly List&lt;int&gt; _materializedList;\n\n    public async Task DemonstratePerformanceCharacteristics()\n    {\n        \/\/ 1. \u9045\u5ef6\u8a55\u4fa1\u3068\u5373\u6642\u8a55\u4fa1\u306e\u6bd4\u8f03\n        var sw = new Stopwatch();\n\n        sw.Start();\n        var lazyResult = _lazySequence\n            .Where(x =&gt; x % 2 == 0)\n            .Any(x =&gt; x &gt; 1000);\n        sw.Stop();\n        Console.WriteLine($\"Lazy evaluation: {sw.ElapsedMilliseconds}ms\");\n\n        sw.Restart();\n        var materializedResult = _materializedList\n            .Where(x =&gt; x % 2 == 0)\n            .Any(x =&gt; x &gt; 1000);\n        sw.Stop();\n        Console.WriteLine($\"Materialized evaluation: {sw.ElapsedMilliseconds}ms\");\n\n        \/\/ 2. \u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u30af\u30a8\u30ea\u3067\u306e\u6700\u9069\u5316\n        var query = _context.Users\n            .Where(u =&gt; u.IsActive)\n            .Include(u =&gt; u.Subscriptions);\n\n        sw.Restart();\n        var hasSubscription = await query\n            .AnyAsync(u =&gt; u.Subscriptions\n                .Any(s =&gt; s.IsActive));\n        sw.Stop();\n        Console.WriteLine($\"Optimized query: {sw.ElapsedMilliseconds}ms\");\n    }\n}<\/pre>\n\n\n\n<div class=\"wp-block-sgb-block-simple sgb-box-simple sgb-box-simple--title-normal sgb-box-simple--with-border\"><div style=\"background-color:var(--wp--preset--color--sango-main);color:#FFF\" class=\"sgb-box-simple__title\">\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u6700\u9069\u5316\u306e\u305f\u3081\u306e\u30ad\u30fc\u30dd\u30a4\u30f3\u30c8<\/div><div class=\"sgb-box-simple__body\" style=\"border-color:var(--wp--preset--color--sango-main);background-color:#FFF\">\n<ol class=\"wp-block-list\">\n<li>\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u30af\u30a8\u30ea\u306e\u6700\u9069\u5316\n<ul class=\"wp-block-list\">\n<li>\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u306e\u9069\u5207\u306a\u4f7f\u7528<\/li>\n\n\n\n<li>\u5fc5\u8981\u6700\u5c0f\u9650\u306e\u30c7\u30fc\u30bf\u53d6\u5f97<\/li>\n\n\n\n<li>\u30af\u30a8\u30ea\u306e\u5b9f\u884c\u8a08\u753b\u306e\u78ba\u8a8d<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li>\u30e1\u30e2\u30ea\u4f7f\u7528\u91cf\u306e\u6700\u9069\u5316\n<ul class=\"wp-block-list\">\n<li>\u5fc5\u8981\u306a\u5834\u5408\u306e\u307f\u30b3\u30ec\u30af\u30b7\u30e7\u30f3\u3092\u5177\u73fe\u5316<\/li>\n\n\n\n<li>\u5927\u898f\u6a21\u30c7\u30fc\u30bf\u306e\u6bb5\u968e\u7684\u306a\u51e6\u7406<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li>\u5b9f\u884c\u6642\u9593\u306e\u6700\u9069\u5316\n<ul class=\"wp-block-list\">\n<li>\u65e9\u671f\u30ea\u30bf\u30fc\u30f3\u306e\u6d3b\u7528<\/li>\n\n\n\n<li>\u9069\u5207\u306a\u30af\u30a8\u30ea\u6761\u4ef6\u306e\u8a2d\u5b9a<\/li>\n\n\n\n<li>\u30ad\u30e3\u30c3\u30b7\u30e5\u306e\u6d3b\u7528<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n<\/div><\/div>\n\n\n\n<p class=\"wp-block-paragraph\">\u3053\u308c\u3089\u306e\u6700\u9069\u5316\u30c6\u30af\u30cb\u30c3\u30af\u3092\u9069\u5207\u306b\u7d44\u307f\u5408\u308f\u305b\u308b\u3053\u3068\u3067\u3001Any\u30e1\u30bd\u30c3\u30c9\u306e\u6027\u80fd\u3092\u6700\u5927\u9650\u306b\u5f15\u304d\u51fa\u3059\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"i-14\">Any\u30e1\u30bd\u30c3\u30c9\u306e\u4ee3\u66ff\u624b\u6bb5\u3068\u6bd4\u8f03<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-15\">Count &gt; 0\u3068Any\u306e\u4f7f\u3044\u5206\u3051<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Count &gt; 0\u3068Any\u306f\u3001\u4f3c\u305f\u3088\u3046\u306a\u7d50\u679c\u3092\u5f97\u3089\u308c\u308b\u624b\u6bb5\u3067\u3059\u304c\u3001\u305d\u308c\u305e\u308c\u306b\u9069\u3057\u305f\u4f7f\u7528\u30b7\u30fc\u30f3\u304c\u7570\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"csharp\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">public class CountVsAnyComparison\n{\n    private readonly DbContext _context;\n\n    \/\/ Any\u304c\u9069\u3057\u3066\u3044\u308b\u30b1\u30fc\u30b9\n    public async Task&lt;bool&gt; CheckForActiveUsersEfficient()\n    {\n        \/\/ \u6761\u4ef6\u3092\u6e80\u305f\u3059\u8981\u7d20\u304c1\u3064\u898b\u3064\u304b\u3063\u305f\u6642\u70b9\u3067\u51e6\u7406\u3092\u7d42\u4e86\n        return await _context.Users.AnyAsync(u =&gt; u.IsActive);\n    }\n\n    \/\/ Count &gt; 0\u304c\u9069\u3057\u3066\u3044\u308b\u30b1\u30fc\u30b9\n    public async Task&lt;(bool hasUsers, int totalCount)&gt; GetUserStatistics()\n    {\n        \/\/ \u7dcf\u6570\u3082\u5fc5\u8981\u306a\u5834\u5408\u306f\u3001Count\u3092\u4f7f\u7528\u3059\u308b\u65b9\u304c\u52b9\u7387\u7684\n        var count = await _context.Users.CountAsync(u =&gt; u.IsActive);\n        return (count &gt; 0, count);\n    }\n\n    \/\/ \u4f7f\u3044\u5206\u3051\u306e\u5b9f\u8df5\u4f8b\n    public async Task ProcessUserData()\n    {\n        \/\/ \u5b58\u5728\u78ba\u8a8d\u306e\u307f\u306e\u5834\u5408\u306fAny\n        if (await _context.Users.AnyAsync(u =&gt; u.NeedsUpdate))\n        {\n            \/\/ \u51e6\u7406\u304c\u5fc5\u8981\u306a\u30e6\u30fc\u30b6\u30fc\u304c\u5b58\u5728\u3059\u308b\u5834\u5408\u306e\u51e6\u7406\n        }\n\n        \/\/ \u4ef6\u6570\u3082\u5fc5\u8981\u306a\u5834\u5408\u306fCount\n        var activeCount = await _context.Users.CountAsync(u =&gt; u.IsActive);\n        Console.WriteLine($\"\u30a2\u30af\u30c6\u30a3\u30d6\u30e6\u30fc\u30b6\u30fc\u6570: {activeCount}\");\n    }\n}<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-16\">FirstOrDefault\u3068Any\u306e\u9069\u5207\u306a\u9078\u629e<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">FirstOrDefault\u3068Any\u306f\u3001\u7570\u306a\u308b\u76ee\u7684\u3092\u6301\u3064\u30e1\u30bd\u30c3\u30c9\u3067\u3059\u304c\u3001\u6642\u3068\u3057\u3066\u9078\u629e\u306b\u8ff7\u3046\u30b1\u30fc\u30b9\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"csharp\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">public class FirstOrDefaultVsAnyComparison\n{\n    private readonly DbContext _context;\n\n    \/\/ FirstOrDefault\u304c\u9069\u3057\u3066\u3044\u308b\u30b1\u30fc\u30b9\n    public async Task&lt;UserResponse&gt; GetUserDetailsEfficient(int userId)\n    {\n        var user = await _context.Users\n            .FirstOrDefaultAsync(u =&gt; u.Id == userId);\n\n        return user != null\n            ? new UserResponse(user)\n            : UserResponse.NotFound();\n    }\n\n    \/\/ Any\u304c\u9069\u3057\u3066\u3044\u308b\u30b1\u30fc\u30b9\n    public async Task&lt;bool&gt; ValidateUserAccess(int userId, int resourceId)\n    {\n        \/\/ \u5b58\u5728\u78ba\u8a8d\u306e\u307f\u304c\u5fc5\u8981\u306a\u5834\u5408\n        return await _context.UserPermissions\n            .AnyAsync(p =&gt; p.UserId == userId &amp;&amp; p.ResourceId == resourceId);\n    }\n\n    \/\/ \u5b9f\u8df5\u7684\u306a\u4f7f\u3044\u5206\u3051\u4f8b\n    public async Task&lt;IActionResult&gt; HandleUserRequest(int userId, int resourceId)\n    {\n        \/\/ \u30a2\u30af\u30bb\u30b9\u6a29\u306e\u78ba\u8a8d\u306b\u306fAny\n        if (!await _context.UserPermissions.AnyAsync(p =&gt; \n            p.UserId == userId &amp;&amp; p.ResourceId == resourceId))\n        {\n            return new ForbiddenResult();\n        }\n\n        \/\/ \u30e6\u30fc\u30b6\u30fc\u60c5\u5831\u306e\u53d6\u5f97\u306b\u306fFirstOrDefault\n        var user = await _context.Users\n            .FirstOrDefaultAsync(u =&gt; u.Id == userId);\n\n        return user != null\n            ? new OkObjectResult(new UserResponse(user))\n            : new NotFoundResult();\n    }\n}<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-17\">\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3068\u30b3\u30fc\u30c9\u53ef\u8aad\u6027\u306e\u89b3\u70b9\u3067\u306e\u6bd4\u8f03<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u5404\u30e1\u30bd\u30c3\u30c9\u306e\u7279\u6027\u3092\u7406\u89e3\u3057\u3001\u9069\u5207\u306b\u4f7f\u3044\u5206\u3051\u308b\u3053\u3068\u3067\u3001\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3068\u30b3\u30fc\u30c9\u53ef\u8aad\u6027\u306e\u4e21\u65b9\u3092\u6700\u9069\u5316\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"csharp\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">public class OptimizationExample\n{\n    private readonly DbContext _context;\n\n    \/\/ \u30b3\u30fc\u30c9\u53ef\u8aad\u6027\u3068\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u306e\u4e21\u7acb\u4f8b\n    public async Task&lt;IActionResult&gt; ProcessOrder(Order order)\n    {\n        \/\/ \u5b58\u5728\u78ba\u8a8d\u306e\u307f\u306e\u5834\u5408\u306fAny\n        if (!await _context.Products.AnyAsync(p =&gt; \n            order.ProductIds.Contains(p.Id)))\n        {\n            return new BadRequestResult(\"\u7121\u52b9\u306a\u5546\u54c1\u304c\u542b\u307e\u308c\u3066\u3044\u307e\u3059\u3002\");\n        }\n\n        \/\/ \u30c7\u30fc\u30bf\u304c\u5fc5\u8981\u306a\u5834\u5408\u306fFirstOrDefault\n        var customer = await _context.Customers\n            .FirstOrDefaultAsync(c =&gt; c.Id == order.CustomerId);\n\n        if (customer == null)\n        {\n            return new NotFoundResult(\"\u9867\u5ba2\u304c\u898b\u3064\u304b\u308a\u307e\u305b\u3093\u3002\");\n        }\n\n        \/\/ \u4ef6\u6570\u304c\u5fc5\u8981\u306a\u5834\u5408\u306fCount\n        var totalOrders = await _context.Orders\n            .CountAsync(o =&gt; o.CustomerId == customer.Id);\n\n        \/\/ \u4ee5\u964d\u306e\u51e6\u7406...\n    }\n}<\/pre>\n\n\n\n<div class=\"wp-block-sgb-block-simple sgb-box-simple sgb-box-simple--title-normal sgb-box-simple--with-border\"><div style=\"background-color:var(--wp--preset--color--sango-main);color:#FFF\" class=\"sgb-box-simple__title\">\u5404\u30e1\u30bd\u30c3\u30c9\u306e\u4f7f\u3044\u5206\u3051\u306e\u6307\u91dd<\/div><div class=\"sgb-box-simple__body\" style=\"border-color:var(--wp--preset--color--sango-main);background-color:#FFF\">\n<ol class=\"wp-block-list\">\n<li>Any\u306e\u4f7f\u7528\u304c\u9069\u5207\u306a\u5834\u5408\n<ul class=\"wp-block-list is-style-sango-list-simple\">\n<li>\u8981\u7d20\u306e\u5b58\u5728\u78ba\u8a8d\u306e\u307f\u304c\u5fc5\u8981<\/li>\n\n\n\n<li>\u65e9\u671f\u30ea\u30bf\u30fc\u30f3\u304c\u53ef\u80fd<\/li>\n\n\n\n<li>\u5927\u898f\u6a21\u30c7\u30fc\u30bf\u30bb\u30c3\u30c8\u3067\u306e\u691c\u7d22<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li>Count &gt; 0\u306e\u4f7f\u7528\u304c\u9069\u5207\u306a\u5834\u5408\n<ul class=\"wp-block-list is-style-sango-list-simple\">\n<li>\u6b63\u78ba\u306a\u4ef6\u6570\u3082\u5fc5\u8981<\/li>\n\n\n\n<li>\u30d0\u30c3\u30c1\u51e6\u7406\u3067\u306e\u4f7f\u7528<\/li>\n\n\n\n<li>\u30ec\u30dd\u30fc\u30c8\u751f\u6210\u6642<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li>FirstOrDefault\u306e\u4f7f\u7528\u304c\u9069\u5207\u306a\u5834\u5408\n<ul class=\"wp-block-list is-style-sango-list-simple\">\n<li>\u8981\u7d20\u306e\u53d6\u5f97\u304c\u5fc5\u8981<\/li>\n\n\n\n<li>\u5358\u4e00\u30ec\u30b3\u30fc\u30c9\u306e\u51e6\u7406<\/li>\n\n\n\n<li>Null\u8a31\u5bb9\u306e\u623b\u308a\u5024\u304c\u5fc5\u8981<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n<\/div><\/div>\n\n\n\n<p class=\"wp-block-paragraph\">\u3053\u308c\u3089\u306e\u4f7f\u3044\u5206\u3051\u3092\u610f\u8b58\u3059\u308b\u3053\u3068\u3067\u3001\u3088\u308a\u52b9\u7387\u7684\u3067\u4fdd\u5b88\u6027\u306e\u9ad8\u3044\u30b3\u30fc\u30c9\u3092\u5b9f\u73fe\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"i-18\">Any\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u7528\u3059\u308b\u969b\u306e\u6ce8\u610f\u70b9\u3068\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-19\">NULL\u30c1\u30a7\u30c3\u30af\u306e\u91cd\u8981\u6027\u3068\u5b9f\u88c5\u65b9\u6cd5<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Any\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u7528\u3059\u308b\u969b\u3001NULL\u30c1\u30a7\u30c3\u30af\u306f\u91cd\u8981\u306a\u8003\u616e\u70b9\u3067\u3059\u3002\u9069\u5207\u306aNULL\u30c1\u30a7\u30c3\u30af\u306e\u5b9f\u88c5\u65b9\u6cd5\u3092\u898b\u3066\u3044\u304d\u307e\u3057\u3087\u3046\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"csharp\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">public class NullCheckExample\n{\n    \/\/ \u63a8\u5968\u3055\u308c\u308b\u5b9f\u88c5\u65b9\u6cd5\n    public bool HasActiveItems(IEnumerable&lt;Item&gt; items)\n    {\n        \/\/ null\u6761\u4ef6\u6f14\u7b97\u5b50\u3092\u4f7f\u7528\u3057\u305f\u5b89\u5168\u306a\u5b9f\u88c5\n        return items?.Any(item =&gt; item.IsActive) ?? false;\n    }\n\n    \/\/ \u3088\u308a\u8a73\u7d30\u306a\u30c1\u30a7\u30c3\u30af\u304c\u5fc5\u8981\u306a\u5834\u5408\n    public bool ValidateItemCollection(IEnumerable&lt;Item&gt; items)\n    {\n        if (items == null)\n        {\n            throw new ArgumentNullException(nameof(items));\n        }\n\n        \/\/ \u30b3\u30ec\u30af\u30b7\u30e7\u30f3\u5185\u306e\u8981\u7d20\u3082NULL\u30c1\u30a7\u30c3\u30af\n        return items.Any(item =&gt; item != null &amp;&amp; item.IsActive);\n    }\n\n    \/\/ \u5b9f\u8df5\u7684\u306a\u4f7f\u7528\u4f8b\n    public async Task&lt;IActionResult&gt; ProcessItems(OrderRequest request)\n    {\n        if (request?.Items == null)\n        {\n            return new BadRequestResult();\n        }\n\n        \/\/ \u7121\u52b9\u306a\u30a2\u30a4\u30c6\u30e0\u306e\u30c1\u30a7\u30c3\u30af\n        if (request.Items.Any(item =&gt; item == null || !item.IsValid))\n        {\n            return new BadRequestResult(\"\u7121\u52b9\u306a\u30a2\u30a4\u30c6\u30e0\u304c\u542b\u307e\u308c\u3066\u3044\u307e\u3059\u3002\");\n        }\n\n        return await ProcessValidItems(request.Items);\n    }\n}<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-20\">\u975e\u540c\u671f\u51e6\u7406\u3067\u306eAny\u30e1\u30bd\u30c3\u30c9\u306e\u4f7f\u7528\u65b9\u6cd5<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u975e\u540c\u671f\u51e6\u7406\u3067Any\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u7528\u3059\u308b\u969b\u306e\u63a8\u5968\u30d1\u30bf\u30fc\u30f3\u3092\u8aac\u660e\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"csharp\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">public class AsyncAnyExample\n{\n    private readonly DbContext _context;\n\n    \/\/ \u57fa\u672c\u7684\u306a\u975e\u540c\u671f\u5b9f\u88c5\n    public async Task&lt;bool&gt; HasActiveSubscriptionsAsync(int userId)\n    {\n        return await _context.Subscriptions\n            .Where(s =&gt; s.UserId == userId)\n            .AnyAsync(s =&gt; s.IsActive);\n    }\n\n    \/\/ \u8907\u5408\u6761\u4ef6\u3067\u306e\u975e\u540c\u671f\u5b9f\u88c5\n    public async Task&lt;bool&gt; ValidateUserStatusAsync(int userId)\n    {\n        \/\/ \u8907\u6570\u306e\u975e\u540c\u671f\u30c1\u30a7\u30c3\u30af\u3092\u52b9\u7387\u7684\u306b\u5b9f\u884c\n        var userTask = _context.Users\n            .AnyAsync(u =&gt; u.Id == userId &amp;&amp; u.IsActive);\n\n        var subscriptionTask = _context.Subscriptions\n            .AnyAsync(s =&gt; s.UserId == userId &amp;&amp; s.IsValid);\n\n        \/\/ \u4e26\u5217\u5b9f\u884c\n        await Task.WhenAll(userTask, subscriptionTask);\n\n        return await userTask &amp;&amp; await subscriptionTask;\n    }\n\n    \/\/ \u30a8\u30e9\u30fc\u30cf\u30f3\u30c9\u30ea\u30f3\u30b0\u3092\u542b\u3080\u5b9f\u88c5\n    public async Task&lt;Result&lt;bool&gt;&gt; CheckUserAccessAsync(int userId, int resourceId)\n    {\n        try\n        {\n            var hasAccess = await _context.UserPermissions\n                .AnyAsync(p =&gt; p.UserId == userId &amp;&amp; \n                              p.ResourceId == resourceId &amp;&amp;\n                              p.IsActive);\n\n            return Result&lt;bool&gt;.Success(hasAccess);\n        }\n        catch (Exception ex)\n        {\n            _logger.LogError(ex, \"\u30e6\u30fc\u30b6\u30fc\u30a2\u30af\u30bb\u30b9\u306e\u78ba\u8a8d\u4e2d\u306b\u30a8\u30e9\u30fc\u304c\u767a\u751f\u3057\u307e\u3057\u305f\u3002\");\n            return Result&lt;bool&gt;.Failure(\"\u30a2\u30af\u30bb\u30b9\u78ba\u8a8d\u306b\u5931\u6557\u3057\u307e\u3057\u305f\u3002\");\n        }\n    }\n}<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-21\">\u5358\u4f53\u30c6\u30b9\u30c8\u3067Any\u3092\u52b9\u679c\u7684\u306b\u691c\u8a3c\u3059\u308b\u65b9\u6cd5<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Any\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u7528\u3059\u308b\u30b3\u30fc\u30c9\u306e\u5358\u4f53\u30c6\u30b9\u30c8\u306e\u5b9f\u88c5\u4f8b\u3092\u793a\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"csharp\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">public class AnyMethodTests\n{\n    [Fact]\n    public void HasActiveItems_WithNullCollection_ReturnsFalse()\n    {\n        \/\/ Arrange\n        var service = new ItemService();\n        IEnumerable&lt;Item&gt; items = null;\n\n        \/\/ Act\n        var result = service.HasActiveItems(items);\n\n        \/\/ Assert\n        Assert.False(result);\n    }\n\n    [Fact]\n    public void HasActiveItems_WithEmptyCollection_ReturnsFalse()\n    {\n        \/\/ Arrange\n        var service = new ItemService();\n        var items = Enumerable.Empty&lt;Item&gt;();\n\n        \/\/ Act\n        var result = service.HasActiveItems(items);\n\n        \/\/ Assert\n        Assert.False(result);\n    }\n\n    [Fact]\n    public async Task HasActiveSubscriptions_WithValidData_ReturnsExpectedResult()\n    {\n        \/\/ Arrange\n        var mockContext = new Mock&lt;DbContext&gt;();\n        var mockSet = new Mock&lt;DbSet&lt;Subscription&gt;&gt;();\n        var subscriptions = new List&lt;Subscription&gt;\n        {\n            new Subscription { UserId = 1, IsActive = true },\n            new Subscription { UserId = 1, IsActive = false }\n        }.AsQueryable();\n\n        mockSet.As&lt;IQueryable&lt;Subscription&gt;&gt;()\n            .Setup(m =&gt; m.Provider)\n            .Returns(subscriptions.Provider);\n        mockSet.As&lt;IQueryable&lt;Subscription&gt;&gt;()\n            .Setup(m =&gt; m.Expression)\n            .Returns(subscriptions.Expression);\n\n        var service = new SubscriptionService(mockContext.Object);\n\n        \/\/ Act\n        var result = await service.HasActiveSubscriptionsAsync(1);\n\n        \/\/ Assert\n        Assert.True(result);\n    }\n}<\/pre>\n\n\n\n<div class=\"wp-block-sgb-block-simple sgb-box-simple sgb-box-simple--title-normal sgb-box-simple--with-border\"><div style=\"background-color:var(--wp--preset--color--sango-main);color:#FFF\" class=\"sgb-box-simple__title\">\u5b9f\u88c5\u6642\u306e\u91cd\u8981\u306a\u30dd\u30a4\u30f3\u30c8<\/div><div class=\"sgb-box-simple__body\" style=\"border-color:var(--wp--preset--color--sango-main);background-color:#FFF\">\n<ol class=\"wp-block-list\">\n<li>NULL\u30c1\u30a7\u30c3\u30af\u3068\u4f8b\u5916\u51e6\u7406\n<ul class=\"wp-block-list\">\n<li>null\u6761\u4ef6\u6f14\u7b97\u5b50\u306e\u6d3b\u7528<\/li>\n\n\n\n<li>\u9069\u5207\u306a\u4f8b\u5916\u30b9\u30ed\u30fc<\/li>\n\n\n\n<li>\u30a8\u30e9\u30fc\u30e1\u30c3\u30bb\u30fc\u30b8\u306e\u660e\u78ba\u5316<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u975e\u540c\u671f\u51e6\u7406\u306e\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9\n<ul class=\"wp-block-list\">\n<li>\u9069\u5207\u306a\u30ad\u30e3\u30f3\u30bb\u30ec\u30fc\u30b7\u30e7\u30f3\u30c8\u30fc\u30af\u30f3\u306e\u4f7f\u7528<\/li>\n\n\n\n<li>\u4e26\u5217\u5b9f\u884c\u306e\u6d3b\u7528<\/li>\n\n\n\n<li>\u30a8\u30e9\u30fc\u30cf\u30f3\u30c9\u30ea\u30f3\u30b0\u306e\u5b9f\u88c5<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u30c6\u30b9\u30c8\u5b9f\u88c5\u306e\u30dd\u30a4\u30f3\u30c8\n<ul class=\"wp-block-list\">\n<li>\u30a8\u30c3\u30b8\u30b1\u30fc\u30b9\u306e\u30ab\u30d0\u30fc<\/li>\n\n\n\n<li>\u30e2\u30c3\u30af\u306e\u9069\u5207\u306a\u8a2d\u5b9a<\/li>\n\n\n\n<li>\u975e\u540c\u671f\u30c6\u30b9\u30c8\u306e\u6b63\u3057\u3044\u5b9f\u88c5<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n<\/div><\/div>\n\n\n\n<p class=\"wp-block-paragraph\">\u3053\u308c\u3089\u306e\u6ce8\u610f\u70b9\u3068\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9\u3092\u610f\u8b58\u3059\u308b\u3053\u3068\u3067\u3001\u3088\u308a\u5805\u7262\u3067\u4fdd\u5b88\u6027\u306e\u9ad8\u3044\u30b3\u30fc\u30c9\u3092\u5b9f\u73fe\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"i-22\">Any\u30e1\u30bd\u30c3\u30c9\u306e\u307e\u3068\u3081<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">C#\u306e<code>Any<\/code>\u30e1\u30bd\u30c3\u30c9\u306f\u3001\u30b3\u30ec\u30af\u30b7\u30e7\u30f3\u306e\u8981\u7d20\u30c1\u30a7\u30c3\u30af\u306b\u304a\u3044\u3066\u975e\u5e38\u306b\u6709\u7528\u306a\u30c4\u30fc\u30eb\u3067\u3059\u3002<br>\u9069\u5207\u306a\u4f7f\u7528\u30b7\u30fc\u30f3\u3092\u7406\u89e3\u3057\u3001\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3092\u610f\u8b58\u3057\u305f\u5b9f\u88c5\u3092\u884c\u3046\u3053\u3068\u3067\u3001\u30b3\u30fc\u30c9\u306e\u54c1\u8cea\u3068\u4fdd\u5b88\u6027\u3092\u5927\u304d\u304f\u5411\u4e0a\u3055\u305b\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<br>\u307e\u305f\u3001\u9069\u5207\u306aNULL\u30c1\u30a7\u30c3\u30af\u3068\u975e\u540c\u671f\u51e6\u7406\u306e\u5b9f\u88c5\u3092\u7d44\u307f\u5408\u308f\u305b\u308b\u3053\u3068\u3067\u3001\u3088\u308a\u5805\u7262\u306a\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u958b\u767a\u304c\u53ef\u80fd\u3068\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<div class=\"wp-block-sgb-block-simple sgb-box-simple sgb-box-simple--title-normal sgb-box-simple--with-border\"><div style=\"background-color:var(--wp--preset--color--sango-main);color:#FFF\" class=\"sgb-box-simple__title\">\u3053\u306e\u8a18\u4e8b\u306e\u4e3b\u306a\u30dd\u30a4\u30f3\u30c8<\/div><div class=\"sgb-box-simple__body\" style=\"border-color:var(--wp--preset--color--sango-main);background-color:#FFF\">\n<p class=\"is-style-sango-paragraph-idea-alt wp-block-paragraph\"><code>Any<\/code>\u306f\u8981\u7d20\u306e\u5b58\u5728\u78ba\u8a8d\u306b\u7279\u5316\u3057\u305f\u30e1\u30bd\u30c3\u30c9\u3067\u3001\u65e9\u671f\u30ea\u30bf\u30fc\u30f3\u304c\u53ef\u80fd<\/p>\n\n\n\n<p class=\"is-style-sango-paragraph-idea-alt wp-block-paragraph\">\u5927\u898f\u6a21\u30c7\u30fc\u30bf\u30bb\u30c3\u30c8\u3067\u306f<code>Count &gt; 0<\/code>\u3088\u308a\u3082<code>Any<\/code>\u304c\u52b9\u7387\u7684<\/p>\n\n\n\n<p class=\"is-style-sango-paragraph-memo-alt wp-block-paragraph\"><code>FirstOrDefault<\/code>\u3068\u306e\u4f7f\u3044\u5206\u3051\u304c\u91cd\u8981\u3067\u3001\u30c7\u30fc\u30bf\u53d6\u5f97\u304c\u5fc5\u8981\u306a\u5834\u5408\u306f<code>FirstOrDefault<\/code>\u3092\u9078\u629e<\/p>\n\n\n\n<p class=\"is-style-sango-paragraph-memo-alt wp-block-paragraph\"><br>NULL\u30c1\u30a7\u30c3\u30af\u3068\u7d44\u307f\u5408\u308f\u305b\u305f\u5b89\u5168\u306a\u5b9f\u88c5\u304c\u5fc5\u9808<\/p>\n\n\n\n<p class=\"is-style-sango-paragraph-memo-alt wp-block-paragraph\">Entity Framework\u3067\u306e\u4f7f\u7528\u6642\u306f\u30af\u30a8\u30ea\u6700\u9069\u5316\u306b\u6ce8\u610f<\/p>\n\n\n\n<p class=\"is-style-sango-paragraph-memo-alt wp-block-paragraph\">\u975e\u540c\u671f\u51e6\u7406\u3067\u306e\u6b63\u3057\u3044\u5b9f\u88c5\u30d1\u30bf\u30fc\u30f3\u3092\u9075\u5b88\u3059\u308b\u3053\u3068\u304c\u91cd\u8981<\/p>\n<\/div><\/div>\n","protected":false},"excerpt":{"rendered":"<p>Warning: Undefined array key &#8220;is_admin&#8221; in \/home\/xs392991\/dexall.co.jp\/public_html\/articles\/wp-content\/themes\/ &#8230; <\/p>\n","protected":false},"author":1,"featured_media":2875,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4,61],"tags":[],"class_list":["post-1527","post","type-post","status-publish","format-standard","has-post-thumbnail","category-csharp","category-csharp-syntax"],"_links":{"self":[{"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=\/wp\/v2\/posts\/1527","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1527"}],"version-history":[{"count":4,"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=\/wp\/v2\/posts\/1527\/revisions"}],"predecessor-version":[{"id":1574,"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=\/wp\/v2\/posts\/1527\/revisions\/1574"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=\/wp\/v2\/media\/2875"}],"wp:attachment":[{"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1527"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1527"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1527"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}