{"id":1994,"date":"2024-12-26T11:40:58","date_gmt":"2024-12-26T02:40:58","guid":{"rendered":"https:\/\/dexall.co.jp\/articles\/?p=1994"},"modified":"2025-03-24T08:48:58","modified_gmt":"2025-03-23T23:48:58","slug":"c-is%e6%bc%94%e7%ae%97%e5%ad%90%e5%ae%8c%e5%85%a8%e3%82%ac%e3%82%a4%e3%83%89%ef%bc%9a%e5%9e%8b%e3%83%81%e3%82%a7%e3%83%83%e3%82%af%e3%81%a8%e3%83%91%e3%82%bf%e3%83%bc%e3%83%b3%e3%83%9e%e3%83%83","status":"publish","type":"post","link":"https:\/\/dexall.co.jp\/articles\/?p=1994","title":{"rendered":"C# is\u6f14\u7b97\u5b50\u5b8c\u5168\u30ac\u30a4\u30c9\uff1a\u578b\u30c1\u30a7\u30c3\u30af\u3068\u30d1\u30bf\u30fc\u30f3\u30de\u30c3\u30c1\u30f3\u30b0\u306e\u5b9f\u8df5\u7684\u306a\u4f7f\u3044\u65b9"},"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\">C# is\u6f14\u7b97\u5b50\u306e\u57fa\u790e\u77e5\u8b58<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-2\">\u578b\u30c1\u30a7\u30c3\u30af\u3092\u884c\u3046is\u6f14\u7b97\u5b50\u306e\u5f79\u5272<\/a>      <\/li>      <li>        <a href=\"#i-5\">\u5f93\u6765\u306egetType\u3084isInstance\u306e\u6bd4\u8f03<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-7\">\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3078\u306e\u5f71\u97ff\u3068\u6700\u9069\u5316<\/a>      <\/li>    <\/ul>  <\/li>  <li>    <a href=\"#i-11\">is\u6f14\u7b97\u5b50\u306e\u57fa\u672c\u7684\u306a\u4f7f\u3044\u65b9<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-12\">null\u5024\u30c1\u30a7\u30c3\u30af\u306e\u5b9f\u88c5\u65b9\u6cd5<\/a>      <\/li>      <li>        <a href=\"#i-13\">\u578b\u30c1\u30a7\u30c3\u30af\u306e\u57fa\u672c\u30d1\u30bf\u30fc\u30f3<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-14\">\u5909\u6570\u5ba3\u8a00\u30d1\u30bf\u30fc\u30f3\u306e\u6d3b\u7528<\/a>      <\/li>    <\/ul>  <\/li>  <li>    <a href=\"#i-15\">\u30d1\u30bf\u30fc\u30f3\u30de\u30c3\u30c1\u30f3\u30b0\u3068is\u6f14\u7b97\u5b50<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-16\">Constant\u30d1\u30bf\u30fc\u30f3\u3067\u306e\u5024\u306e\u691c\u8a3c<\/a>      <\/li>      <li>        <a href=\"#i-17\">Type\u30d1\u30bf\u30fc\u30f3\u3092\u4f7f\u7528\u3057\u305f\u578b\u30c1\u30a7\u30c3\u30af<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-18\">Property\u30d1\u30bf\u30fc\u30f3\u306b\u3088\u308b\u30d7\u30ed\u30d1\u30c6\u30a3\u691c\u8a3c<\/a>      <\/li>    <\/ul>  <\/li>  <li>    <a href=\"#i-19\">\u5b9f\u8df5\u7684\u306a\u30e6\u30fc\u30b9\u30b1\u30fc\u30b9<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-20\">\u591a\u614b\u6027\u3092\u6d3b\u7528\u3057\u305f\u6761\u4ef6\u5206\u5c90<\/a>      <\/li>      <li>        <a href=\"#i-21\">\u30c7\u30fc\u30bf\u691c\u8a3c\u51e6\u7406\u3067\u306e\u6d3b\u7528\u65b9\u6cd5<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-22\">\u4f8b\u5916\u51e6\u7406\u3068\u306e\u7d44\u307f\u5408\u308f\u305b<\/a>      <\/li>    <\/ul>  <\/li>  <li>    <a href=\"#i-23\">is\u6f14\u7b97\u5b50\u306e\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-24\">\u53ef\u8aad\u6027\u3092\u8003\u616e\u3057\u305f\u30d1\u30bf\u30fc\u30f3\u9078\u629e<\/a>      <\/li>      <li>        <a href=\"#i-25\">\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3092\u610f\u8b58\u3057\u305f\u5b9f\u88c5<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-26\">\u4e00\u822c\u7684\u306a\u5b9f\u88c5\u30df\u30b9\u3068\u5bfe\u7b56<\/a>      <\/li>    <\/ul>  <\/li>  <li>    <a href=\"#i-27\">C# 12\u3067\u306e\u65b0\u6a5f\u80fd\u3068\u5c06\u6765\u5c55\u671b<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-28\">\u30ea\u30b9\u30c8\u30d1\u30bf\u30fc\u30f3\u306e\u5c0e\u5165\u3068\u6d3b\u7528<\/a>      <\/li>      <li>        <a href=\"#i-29\">\u30b9\u30d7\u30ec\u30c3\u30c9\u30d1\u30bf\u30fc\u30f3\u306e\u5b9f\u88c5\u4f8b<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-30\">\u4eca\u5f8c\u8ffd\u52a0\u3055\u308c\u308b\u53ef\u80fd\u6027\u306e\u3042\u308b\u6a5f\u80fd<\/a>      <\/li>    <\/ul>  <\/li>  <li class=\"last\">    <a href=\"#i-35\">is\u6f14\u7b97\u5b50\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>C#\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u306b\u304a\u3044\u3066\u3001\u578b\u30c1\u30a7\u30c3\u30af\u306f\u5805\u7262\u306a\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u958b\u767a\u306e\u8981\u3068\u306a\u308a\u307e\u3059\u3002is\u6f14\u7b97\u5b50\u306f\u578b\u30c1\u30a7\u30c3\u30af\u306e\u4e2d\u6838\u3092\u62c5\u3046\u6a5f\u80fd\u3067\u3042\u308a\u3001C# 12\u3067\u5c0e\u5165\u3055\u308c\u305f\u65b0\u6a5f\u80fd\u3068\u4f75\u305b\u3066\u3001\u3088\u308a\u5f37\u529b\u306a\u30d1\u30bf\u30fc\u30f3\u30de\u30c3\u30c1\u30f3\u30b0\u304c\u53ef\u80fd\u306b\u306a\u308a\u307e\u3057\u305f\u3002<br>\u672c\u8a18\u4e8b\u3067\u306f\u3001is\u6f14\u7b97\u5b50\u306e\u57fa\u672c\u304b\u3089\u5fdc\u7528\u307e\u3067\u3001\u5b9f\u8df5\u7684\u306a\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\">is\u6f14\u7b97\u5b50\u306e\u57fa\u672c\u7684\u306a\u4f7f\u3044\u65b9\u3068\u5f93\u6765\u306e\u578b\u30c1\u30a7\u30c3\u30af\u65b9\u6cd5\u3068\u306e\u9055\u3044<\/p>\n\n\n\n<p class=\"is-style-sango-paragraph-idea-alt\">\u30d1\u30bf\u30fc\u30f3\u30de\u30c3\u30c1\u30f3\u30b0\u3092\u6d3b\u7528\u3057\u305f\u52b9\u7387\u7684\u306a\u578b\u30c1\u30a7\u30c3\u30af\u624b\u6cd5<\/p>\n\n\n\n<p class=\"is-style-sango-paragraph-idea-alt\">\u5b9f\u52d9\u3067\u4f7f\u3048\u308b\u5177\u4f53\u7684\u306a\u30e6\u30fc\u30b9\u30b1\u30fc\u30b9\u3068\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9<\/p>\n\n\n\n<p class=\"is-style-sango-paragraph-idea-alt\">null\u5024\u30c1\u30a7\u30c3\u30af\u3068\u4f8b\u5916\u51e6\u7406\u306e\u9069\u5207\u306a\u5b9f\u88c5\u65b9\u6cd5<\/p>\n\n\n\n<p class=\"is-style-sango-paragraph-idea-alt\">C# 12\u3067\u5c0e\u5165\u3055\u308c\u305f\u65b0\u3057\u3044\u30d1\u30bf\u30fc\u30f3\u30de\u30c3\u30c1\u30f3\u30b0\u6a5f\u80fd<\/p>\n\n\n\n<p class=\"is-style-sango-paragraph-idea-alt\">\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3092\u8003\u616e\u3057\u305f\u6700\u9069\u306a\u5b9f\u88c5\u624b\u6cd5<\/p>\n<\/div><\/div>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"i-1\">C# is\u6f14\u7b97\u5b50\u306e\u57fa\u790e\u77e5\u8b58<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-2\">\u578b\u30c1\u30a7\u30c3\u30af\u3092\u884c\u3046is\u6f14\u7b97\u5b50\u306e\u5f79\u5272<\/h3>\n\n\n\n<p>is\u6f14\u7b97\u5b50\u306f\u3001C#\u306b\u304a\u3051\u308b\u578b\u30c1\u30a7\u30c3\u30af\u306e\u4e2d\u6838\u3092\u62c5\u3046\u6f14\u7b97\u5b50\u3067\u3059\u3002\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u304c\u7279\u5b9a\u306e\u578b\u3068\u4e92\u63db\u6027\u304c\u3042\u308b\u304b\u3069\u3046\u304b\u3092\u5b9f\u884c\u6642\u306b\u78ba\u8a8d\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u3001\u578b\u306e\u5b89\u5168\u6027\u3092\u4fdd\u8a3c\u3059\u308b\u91cd\u8981\u306a\u5f79\u5272\u3092\u679c\u305f\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-3\">\u57fa\u672c\u7684\u306a\u69cb\u6587<\/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=\"\">using System;\n\npublic class TypeCheckExample\n{\n    public static void DemonstrateTypeCheck(object obj)\n    {\n        \/\/ \u57fa\u672c\u7684\u306a\u578b\u30c1\u30a7\u30c3\u30af\n        if (obj is string) \n        {\n            Console.WriteLine(\"\u6587\u5b57\u5217\u578b\u3067\u3059\");\n        }\n\n        \/\/ \u30d1\u30bf\u30fc\u30f3\u30de\u30c3\u30c1\u30f3\u30b0\u3092\u4f7f\u7528\u3057\u305f\u578b\u30c1\u30a7\u30c3\u30af\u3068\u5909\u6570\u5ba3\u8a00\n        if (obj is string str) \n        {\n            Console.WriteLine($\"\u6587\u5b57\u5217\u5024: {str}\");\n        }\n    }\n}<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-4\">is\u6f14\u7b97\u5b50\u306e\u4e3b\u306a\u6a5f\u80fd<\/h4>\n\n\n\n<div class=\"wp-block-sgb-box sng-box box6\">\n<ul class=\"wp-block-list is-style-sango-list-simple\">\n<li>\u578b\u306e\u5b89\u5168\u6027\u78ba\u8a8d<\/li>\n\n\n\n<li>null\u5024\u306e\u30c1\u30a7\u30c3\u30af<\/li>\n\n\n\n<li>\u30d1\u30bf\u30fc\u30f3\u30de\u30c3\u30c1\u30f3\u30b0\u3068\u306e\u9023\u643a<\/li>\n\n\n\n<li>\u5909\u6570\u5ba3\u8a00\u3068\u306e\u7d71\u5408<\/li>\n<\/ul>\n<\/div>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-5\">\u5f93\u6765\u306egetType\u3084isInstance\u306e\u6bd4\u8f03<\/h3>\n\n\n\n<p>\u5f93\u6765\u306e\u578b\u30c1\u30a7\u30c3\u30af\u65b9\u6cd5\u3068\u6bd4\u8f03\u3059\u308b\u3068\u3001is\u6f14\u7b97\u5b50\u306b\u306f\u660e\u78ba\u306a\u5229\u70b9\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"csharp\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">using System;\n\npublic class TypeCheckComparison\n{\n    public class Animal {}\n    public class Dog : Animal {}\n\n    public static void CompareTypeMethods()\n    {\n        Dog dog = new Dog();\n\n        \/\/ GetType()\u306b\u3088\u308b\u6bd4\u8f03\n        bool isAnimalByType = dog.GetType() == typeof(Animal);    \/\/ False\n\n        \/\/ is\u6f14\u7b97\u5b50\u306b\u3088\u308b\u6bd4\u8f03\n        bool isAnimalByIs = dog is Animal;                        \/\/ True\n\n        Console.WriteLine($\"GetType\u6bd4\u8f03: {isAnimalByType}\");\n        Console.WriteLine($\"is\u6f14\u7b97\u5b50\u6bd4\u8f03: {isAnimalByIs}\");\n    }\n}<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-6\">\u6bd4\u8f03\u8868<\/h4>\n\n\n<div id=\"id-407d20a0-1677-4d02-8206-1dfd09fd389d\">\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>\u65b9\u6cd5<\/th><th>\u5229\u70b9<\/th><th>\u5236\u9650\u4e8b\u9805<\/th><\/tr><\/thead><tbody><tr><td>GetType()<\/td><td>\u6b63\u78ba\u306a\u578b\u306e\u53d6\u5f97\u304c\u53ef\u80fd<\/td><td>\u6d3e\u751f\u578b\u3092\u8003\u616e\u3057\u306a\u3044<\/td><\/tr><tr><td>is\u6f14\u7b97\u5b50<\/td><td>\u7d99\u627f\u95a2\u4fc2\u3092\u8003\u616e\u3057\u305f\u578b\u30c1\u30a7\u30c3\u30af\u304c\u53ef\u80fd<\/td><td>\u2013<\/td><\/tr><tr><td>instanceof (Java\u7b49)<\/td><td>\u2013<\/td><td>C#\u306b\u306f\u5b58\u5728\u3057\u306a\u3044<\/td><\/tr><\/tbody><\/table><\/figure>\n<\/div>\n\n\n<h3 class=\"wp-block-heading\" id=\"i-7\">\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3078\u306e\u5f71\u97ff\u3068\u6700\u9069\u5316<\/h3>\n\n\n\n<p>is\u6f14\u7b97\u5b50\u306e\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u306b\u3064\u3044\u3066\u3001\u91cd\u8981\u306a\u30dd\u30a4\u30f3\u30c8\u3092\u307e\u3068\u3081\u307e\u3059\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-8\">1. \u5b9f\u884c\u6642\u306e\u30aa\u30fc\u30d0\u30fc\u30d8\u30c3\u30c9<\/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=\"\">using System;\nusing System.Collections.Generic;\n\npublic class PerformanceOptimization\n{\n    public static void ProcessItems&lt;T&gt;(IEnumerable&lt;object&gt; items) where T : class\n    {\n        \/\/ \u826f\u3044\u4f8b\uff1a\u578b\u60c5\u5831\u306e\u30ad\u30e3\u30c3\u30b7\u30e5\n        foreach (var item in items)\n        {\n            if (item is T typedItem)  \/\/ \u578b\u30c1\u30a7\u30c3\u30af\u3068\u5909\u63db\u30921\u56de\u3067\u5b9f\u884c\n            {\n                Process(typedItem);\n            }\n        }\n\n        \/\/ \u907f\u3051\u308b\u3079\u304d\u4f8b\uff1a\u6bce\u56deGetType()\u3092\u547c\u3073\u51fa\u3059\n        var type = typeof(T);\n        foreach (var item in items)\n        {\n            if (item.GetType() == type)  \/\/ \u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u304c\u4f4e\u4e0b\n            {\n                Process((T)item);\n            }\n        }\n    }\n\n    private static void Process&lt;T&gt;(T item) where T : class\n    {\n        \/\/ \u51e6\u7406\u306e\u5b9f\u88c5\n    }\n}<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-9\">2. \u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u6700\u9069\u5316\u306e\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9<\/h4>\n\n\n\n<div class=\"wp-block-sgb-box sng-box box6\">\n<ul class=\"wp-block-list is-style-sango-list-simple\">\n<li>\u4e0d\u5fc5\u8981\u306a\u578b\u30c1\u30a7\u30c3\u30af\u3092\u907f\u3051\u308b<\/li>\n\n\n\n<li>\u30db\u30c3\u30c8\u30d1\u30b9\u3067\u306e\u904e\u5ea6\u306a\u4f7f\u7528\u3092\u63a7\u3048\u308b<\/li>\n\n\n\n<li>\u30ad\u30e3\u30c3\u30b7\u30e5\u3092\u6d3b\u7528\u3057\u3066\u578b\u60c5\u5831\u3092\u518d\u5229\u7528\u3059\u308b<\/li>\n\n\n\n<li>\u30d1\u30bf\u30fc\u30f3\u30de\u30c3\u30c1\u30f3\u30b0\u3068\u7d44\u307f\u5408\u308f\u305b\u3066\u578b\u30c1\u30a7\u30c3\u30af\u3068\u30ad\u30e3\u30b9\u30c8\u30921\u56de\u3067\u884c\u3046<\/li>\n<\/ul>\n<\/div>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-10\">3. \u30e1\u30e2\u30ea\u4f7f\u7528\u91cf\u3078\u306e\u5f71\u97ff<\/h4>\n\n\n\n<div class=\"wp-block-sgb-box sng-box box6\">\n<ul class=\"wp-block-list is-style-sango-list-simple\">\n<li>is\u6f14\u7b97\u5b50\u81ea\u4f53\u306f\u8ffd\u52a0\u306e\u30e1\u30e2\u30ea\u5272\u308a\u5f53\u3066\u3092\u884c\u308f\u306a\u3044<\/li>\n\n\n\n<li>\u30d1\u30bf\u30fc\u30f3\u30de\u30c3\u30c1\u30f3\u30b0\u3068\u7d44\u307f\u5408\u308f\u305b\u305f\u5834\u5408\u3082\u3001\u901a\u5e38\u306f\u8ffd\u52a0\u306e\u30e1\u30e2\u30ea\u5272\u308a\u5f53\u3066\u306f\u6700\u5c0f\u9650<\/li>\n<\/ul>\n<\/div>\n\n\n\n<p>\u3053\u306e\u57fa\u790e\u77e5\u8b58\u3092\u8e0f\u307e\u3048\u308b\u3053\u3068\u3067\u3001is\u6f14\u7b97\u5b50\u3092\u52b9\u679c\u7684\u306b\u6d3b\u7528\u3057\u3001\u578b\u5b89\u5168\u306a\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u3092\u5b9f\u73fe\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"i-11\">is\u6f14\u7b97\u5b50\u306e\u57fa\u672c\u7684\u306a\u4f7f\u3044\u65b9<\/h2>\n\n\n\n<p>\u524d\u7bc0\u3067\u5b66\u3093\u3060\u57fa\u790e\u77e5\u8b58\u3092\u8e0f\u307e\u3048\u3001is\u6f14\u7b97\u5b50\u306e\u3088\u308a\u5b9f\u8df5\u7684\u306a\u4f7f\u7528\u65b9\u6cd5\u3092\u898b\u3066\u3044\u304d\u307e\u3057\u3087\u3046\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-12\">null\u5024\u30c1\u30a7\u30c3\u30af\u306e\u5b9f\u88c5\u65b9\u6cd5<\/h3>\n\n\n\n<p>is\u6f14\u7b97\u5b50\u3092\u4f7f\u7528\u3057\u305fnull\u5024\u30c1\u30a7\u30c3\u30af\u306f\u3001\u30b3\u30fc\u30c9\u306e\u5b89\u5168\u6027\u3092\u9ad8\u3081\u308b\u91cd\u8981\u306a\u624b\u6cd5\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=\"\">using System;\n\npublic class NullCheckExample\n{\n    public static void ProcessData(object data)\n    {\n        \/\/ null\u5024\u306e\u57fa\u672c\u7684\u306a\u30c1\u30a7\u30c3\u30af\n        if (data is null)\n        {\n            throw new ArgumentNullException(nameof(data));\n        }\n\n        \/\/ null\u4ee5\u5916\u306e\u5024\u306e\u51e6\u7406\n        if (data is not null)\n        {\n            Console.WriteLine(\"\u30c7\u30fc\u30bf\u304c\u5b58\u5728\u3057\u307e\u3059\");\n        }\n\n        \/\/ \u30d1\u30bf\u30fc\u30f3\u30de\u30c3\u30c1\u30f3\u30b0\u3068null\u30c1\u30a7\u30c3\u30af\u306e\u7d44\u307f\u5408\u308f\u305b\n        if (data is string text and not null)\n        {\n            Console.WriteLine($\"\u6587\u5b57\u5217\u30c7\u30fc\u30bf: {text}\");\n        }\n    }\n}<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-13\">\u578b\u30c1\u30a7\u30c3\u30af\u306e\u57fa\u672c\u30d1\u30bf\u30fc\u30f3<\/h3>\n\n\n\n<p>\u578b\u30c1\u30a7\u30c3\u30af\u306f\u3001\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u578b\u5b89\u5168\u6027\u3092\u78ba\u4fdd\u3059\u308b\u57fa\u672c\u7684\u306a\u624b\u6cd5\u3067\u3059\u3002\u4ee5\u4e0b\u306b\u4e3b\u8981\u306a\u30d1\u30bf\u30fc\u30f3\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=\"\">using System;\n\npublic class BasicPatternExample\n{\n    public static void ProcessValue(object value)\n    {\n        \/\/ \u57fa\u672c\u7684\u306a\u578b\u30c1\u30a7\u30c3\u30af\u30d1\u30bf\u30fc\u30f3\n        if (value is int number)\n        {\n            Console.WriteLine($\"\u6574\u6570\u5024: {number}\");\n        }\n        else if (value is DateTime date)\n        {\n            Console.WriteLine($\"\u65e5\u4ed8: {date:yyyy\/MM\/dd}\");\n        }\n        else if (value is string str &amp;&amp; str.Length &gt; 0)\n        {\n            Console.WriteLine($\"\u7a7a\u3067\u306a\u3044\u6587\u5b57\u5217: {str}\");\n        }\n    }\n}<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-14\">\u5909\u6570\u5ba3\u8a00\u30d1\u30bf\u30fc\u30f3\u306e\u6d3b\u7528<\/h3>\n\n\n\n<p>\u5909\u6570\u5ba3\u8a00\u30d1\u30bf\u30fc\u30f3\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u578b\u30c1\u30a7\u30c3\u30af\u3068\u30ad\u30e3\u30b9\u30c8\u30921\u3064\u306e\u64cd\u4f5c\u3067\u884c\u3046\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"csharp\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">using System;\n\npublic class DeclarationPatternExample\n{\n    public class Person\n    {\n        public string Name { get; set; }\n        public int Age { get; set; }\n    }\n\n    public static void ProcessObject(object obj)\n    {\n        \/\/ \u5909\u6570\u5ba3\u8a00\u30d1\u30bf\u30fc\u30f3\u306e\u57fa\u672c\n        if (obj is Person person)\n        {\n            Console.WriteLine($\"\u540d\u524d: {person.Name}, \u5e74\u9f62: {person.Age}\");\n        }\n\n        \/\/ switch\u5f0f\u3067\u306e\u6d3b\u7528\n        var description = obj switch\n        {\n            Person p =&gt; $\"\u4eba\u7269: {p.Name}\",\n            string s =&gt; $\"\u6587\u5b57\u5217: {s}\",\n            int n =&gt; $\"\u6570\u5024: {n}\",\n            _ =&gt; \"\u4e0d\u660e\u306a\u30bf\u30a4\u30d7\"\n        };\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\">\u5909\u6570\u5ba3\u8a00\u30d1\u30bf\u30fc\u30f3\u3092\u4f7f\u7528\u3059\u308b\u969b\u306e\u4e3b\u306a\u30e1\u30ea\u30c3\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-good-alt\">\u30b3\u30fc\u30c9\u306e\u7c21\u6f54\u3055\u5411\u4e0a<\/p>\n\n\n\n<p class=\"is-style-sango-paragraph-good-alt\">\u578b\u30c1\u30a7\u30c3\u30af\u3068\u30ad\u30e3\u30b9\u30c8\u306e\u7d71\u5408<\/p>\n\n\n\n<p class=\"is-style-sango-paragraph-good-alt\">\u30b3\u30f3\u30d1\u30a4\u30eb\u6642\u306e\u578b\u5b89\u5168\u6027\u78ba\u4fdd<\/p>\n\n\n\n<p class=\"is-style-sango-paragraph-good-alt\">\u30d1\u30bf\u30fc\u30f3\u30de\u30c3\u30c1\u30f3\u30b0\u3068\u306e\u89aa\u548c\u6027<\/p>\n<\/div><\/div>\n\n\n\n<p>\u3053\u308c\u3089\u306e\u57fa\u672c\u7684\u306a\u4f7f\u3044\u65b9\u3092\u7406\u89e3\u3059\u308b\u3053\u3068\u3067\u3001\u3088\u308a\u5805\u7262\u3067\u4fdd\u5b88\u6027\u306e\u9ad8\u3044\u30b3\u30fc\u30c9\u3092\u66f8\u304f\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"i-15\">\u30d1\u30bf\u30fc\u30f3\u30de\u30c3\u30c1\u30f3\u30b0\u3068is\u6f14\u7b97\u5b50<\/h2>\n\n\n\n<p>is\u6f14\u7b97\u5b50\u306e\u6a5f\u80fd\u3092\u6700\u5927\u9650\u306b\u6d3b\u7528\u3059\u308b\u305f\u3081\u3001\u3055\u307e\u3056\u307e\u306a\u30d1\u30bf\u30fc\u30f3\u30de\u30c3\u30c1\u30f3\u30b0\u624b\u6cd5\u306b\u3064\u3044\u3066\u8a73\u3057\u304f\u898b\u3066\u3044\u304d\u307e\u3057\u3087\u3046\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-16\">Constant\u30d1\u30bf\u30fc\u30f3\u3067\u306e\u5024\u306e\u691c\u8a3c<\/h3>\n\n\n\n<p>Constant\u30d1\u30bf\u30fc\u30f3\u306f\u3001\u5024\u3092\u76f4\u63a5\u6bd4\u8f03\u3059\u308b\u6700\u3082\u30b7\u30f3\u30d7\u30eb\u306a\u30d1\u30bf\u30fc\u30f3\u30de\u30c3\u30c1\u30f3\u30b0\u306e\u5f62\u5f0f\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 ConstantPatternExample\n{\n    public static string ValidateValue(object value)\n    {\n        return value switch\n        {\n            null =&gt; \"\u5024\u304cnull\u3067\u3059\",\n            42 =&gt; \"\u7279\u5225\u306a\u5024\u3067\u3059\",\n            \"admin\" =&gt; \"\u7ba1\u7406\u8005\u3067\u3059\",\n            true =&gt; \"\u771f\u306e\u5024\u3067\u3059\",\n            false =&gt; \"\u507d\u306e\u5024\u3067\u3059\",\n            _ =&gt; \"\u305d\u306e\u4ed6\u306e\u5024\"\n        };\n    }\n}<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-17\">Type\u30d1\u30bf\u30fc\u30f3\u3092\u4f7f\u7528\u3057\u305f\u578b\u30c1\u30a7\u30c3\u30af<\/h3>\n\n\n\n<p>Type\u30d1\u30bf\u30fc\u30f3\u306f\u3001\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u578b\u3092\u691c\u8a3c\u3057\u3001\u578b\u5b89\u5168\u306a\u64cd\u4f5c\u3092\u53ef\u80fd\u306b\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=\"\">using System;\n\npublic class TypePatternExample\n{\n    public abstract class Shape\n    {\n        public abstract double CalculateArea();\n    }\n\n    public class Circle : Shape\n    {\n        public double Radius { get; set; }\n        public override double CalculateArea() =&gt; Math.PI * Radius * Radius;\n    }\n\n    public class Rectangle : Shape\n    {\n        public double Width { get; set; }\n        public double Height { get; set; }\n        public override double CalculateArea() =&gt; Width * Height;\n    }\n\n    public static string DescribeShape(Shape shape)\n    {\n        return shape switch\n        {\n            Circle c =&gt; $\"\u5186\uff08\u534a\u5f84: {c.Radius}\uff09\",\n            Rectangle r =&gt; $\"\u9577\u65b9\u5f62\uff08\u5e45: {r.Width}, \u9ad8\u3055: {r.Height}\uff09\",\n            null =&gt; \"\u56f3\u5f62\u304c\u3042\u308a\u307e\u305b\u3093\",\n            _ =&gt; \"\u4e0d\u660e\u306a\u56f3\u5f62\"\n        };\n    }\n}<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-18\">Property\u30d1\u30bf\u30fc\u30f3\u306b\u3088\u308b\u30d7\u30ed\u30d1\u30c6\u30a3\u691c\u8a3c<\/h3>\n\n\n\n<p>Property\u30d1\u30bf\u30fc\u30f3\u3092\u4f7f\u7528\u3059\u308b\u3068\u3001\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u30d7\u30ed\u30d1\u30c6\u30a3\u3092\u8a73\u7d30\u306b\u691c\u8a3c\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 PropertyPatternExample\n{\n    public class Product\n    {\n        public string Name { get; set; }\n        public decimal Price { get; set; }\n        public int Stock { get; set; }\n        public bool IsDiscounted { get; set; }\n    }\n\n    public static string AnalyzeProduct(Product product)\n    {\n        return product switch\n        {\n            { Price: &lt;= 0 } =&gt; \"\u7121\u52b9\u306a\u4fa1\u683c\u8a2d\u5b9a\u3067\u3059\",\n            { Stock: 0 } =&gt; \"\u5728\u5eab\u5207\u308c\",\n            { IsDiscounted: true, Price: &gt; 10000m } =&gt; \"\u5927\u578b\u30bb\u30fc\u30eb\u5546\u54c1\",\n            { Stock: &lt; 10 } =&gt; \"\u5728\u5eab\u6b8b\u308a\u308f\u305a\u304b\",\n            { } =&gt; \"\u901a\u5e38\u5546\u54c1\",\n            null =&gt; \"\u5546\u54c1\u30c7\u30fc\u30bf\u306a\u3057\"\n        };\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\">\u30d7\u30ed\u30d1\u30c6\u30a3\u30d1\u30bf\u30fc\u30f3\u306e\u4e3b\u306a\u7279\u5fb4<\/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>\u8907\u6570\u306e\u30d7\u30ed\u30d1\u30c6\u30a3\u3092\u540c\u6642\u306b\u691c\u8a3c\u53ef\u80fd<\/li>\n\n\n\n<li>\u30cd\u30b9\u30c8\u3055\u308c\u305f\u30d7\u30ed\u30d1\u30c6\u30a3\u3078\u306e\u30a2\u30af\u30bb\u30b9<\/li>\n\n\n\n<li>when\u30ad\u30fc\u30ef\u30fc\u30c9\u306b\u3088\u308b\u8ffd\u52a0\u6761\u4ef6\u306e\u6307\u5b9a<\/li>\n\n\n\n<li>\u5909\u6570\u306e\u62bd\u51fa\u3068\u518d\u5229\u7528<\/li>\n\n\n\n<li>\u30d1\u30bf\u30fc\u30f3\u306e\u7d44\u307f\u5408\u308f\u305b\u306b\u3088\u308b\u67d4\u8edf\u306a\u6761\u4ef6\u6307\u5b9a<\/li>\n<\/ol>\n<\/div><\/div>\n\n\n\n<p>\u3053\u308c\u3089\u306e\u30d1\u30bf\u30fc\u30f3\u30de\u30c3\u30c1\u30f3\u30b0\u6a5f\u80fd\u3092\u9069\u5207\u306b\u7d44\u307f\u5408\u308f\u305b\u308b\u3053\u3068\u3067\u3001\u3088\u308a\u8868\u73fe\u529b\u8c4a\u304b\u3067\u4fdd\u5b88\u6027\u306e\u9ad8\u3044\u30b3\u30fc\u30c9\u3092\u4f5c\u6210\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"i-19\">\u5b9f\u8df5\u7684\u306a\u30e6\u30fc\u30b9\u30b1\u30fc\u30b9<\/h2>\n\n\n\n<p>\u3053\u308c\u307e\u3067\u5b66\u3093\u3060is\u6f14\u7b97\u5b50\u3068\u30d1\u30bf\u30fc\u30f3\u30de\u30c3\u30c1\u30f3\u30b0\u306e\u77e5\u8b58\u3092\u3001\u5b9f\u969b\u306e\u30d3\u30b8\u30cd\u30b9\u30b7\u30ca\u30ea\u30aa\u306b\u9069\u7528\u3059\u308b\u65b9\u6cd5\u3092\u898b\u3066\u3044\u304d\u307e\u3057\u3087\u3046\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-20\">\u591a\u614b\u6027\u3092\u6d3b\u7528\u3057\u305f\u6761\u4ef6\u5206\u5c90<\/h3>\n\n\n\n<p>\u591a\u614b\u6027\u3068is\u6f14\u7b97\u5b50\u3092\u7d44\u307f\u5408\u308f\u305b\u308b\u3053\u3068\u3067\u3001\u67d4\u8edf\u3067\u4fdd\u5b88\u6027\u306e\u9ad8\u3044\u30b3\u30fc\u30c9\u3092\u5b9f\u73fe\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=\"\">using System;\n\npublic class PaymentProcessingExample\n{\n    public abstract class Payment\n    {\n        public decimal Amount { get; set; }\n        public abstract bool ProcessPayment();\n    }\n\n    public class CreditCardPayment : Payment\n    {\n        public string CardNumber { get; set; }\n        public override bool ProcessPayment() =&gt; true; \/\/ \u5b9f\u88c5\u7701\u7565\n    }\n\n    public class BankTransferPayment : Payment\n    {\n        public string AccountNumber { get; set; }\n        public override bool ProcessPayment() =&gt; true; \/\/ \u5b9f\u88c5\u7701\u7565\n    }\n\n    public class PaymentProcessor\n    {\n        public string ProcessPaymentRequest(Payment payment)\n        {\n            return payment switch\n            {\n                CreditCardPayment card =&gt; ProcessCreditCard(card),\n                BankTransferPayment bank =&gt; ProcessBankTransfer(bank),\n                null =&gt; \"\u652f\u6255\u3044\u60c5\u5831\u304c\u3042\u308a\u307e\u305b\u3093\",\n                _ =&gt; \"\u672a\u5bfe\u5fdc\u306e\u652f\u6255\u3044\u65b9\u6cd5\u3067\u3059\"\n            };\n        }\n\n        private string ProcessCreditCard(CreditCardPayment payment) =&gt;\n            payment.CardNumber?.Length == 16 ? \"\u30af\u30ec\u30b8\u30c3\u30c8\u30ab\u30fc\u30c9\u51e6\u7406\u5b8c\u4e86\" : \"\u7121\u52b9\u306a\u30ab\u30fc\u30c9\u756a\u53f7\";\n\n        private string ProcessBankTransfer(BankTransferPayment payment) =&gt;\n            !string.IsNullOrEmpty(payment.AccountNumber) ? \"\u9280\u884c\u632f\u8fbc\u51e6\u7406\u5b8c\u4e86\" : \"\u7121\u52b9\u306a\u53e3\u5ea7\u756a\u53f7\";\n    }\n}<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-21\">\u30c7\u30fc\u30bf\u691c\u8a3c\u51e6\u7406\u3067\u306e\u6d3b\u7528\u65b9\u6cd5<\/h3>\n\n\n\n<p>\u30c7\u30fc\u30bf\u691c\u8a3c\u30b7\u30ca\u30ea\u30aa\u3067\u306f\u3001is\u6f14\u7b97\u5b50\u3068\u30d1\u30bf\u30fc\u30f3\u30de\u30c3\u30c1\u30f3\u30b0\u3092\u7d44\u307f\u5408\u308f\u305b\u308b\u3053\u3068\u3067\u3001\u8907\u96d1\u306a\u691c\u8a3c\u30ed\u30b8\u30c3\u30af\u3092\u7c21\u6f54\u306b\u8868\u73fe\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=\"\">using System;\nusing System.Collections.Generic;\n\npublic class ValidationExample\n{\n    public class UserData\n    {\n        public string Username { get; set; }\n        public string Email { get; set; }\n        public int Age { get; set; }\n        public string Role { get; set; }\n    }\n\n    public static List&lt;string&gt; ValidateUser(UserData user)\n    {\n        var errors = new List&lt;string&gt;();\n\n        \/\/ \u8907\u5408\u7684\u306a\u691c\u8a3c\u30d1\u30bf\u30fc\u30f3\n        if (user is { Username: var username, Email: var email }\n            when string.IsNullOrEmpty(username) || string.IsNullOrEmpty(email))\n        {\n            errors.Add(\"\u30e6\u30fc\u30b6\u30fc\u540d\u3068\u30e1\u30fc\u30eb\u30a2\u30c9\u30ec\u30b9\u306f\u5fc5\u9808\u3067\u3059\");\n        }\n\n        if (user is { Age: &lt; 18 })\n        {\n            errors.Add(\"\u30e6\u30fc\u30b6\u30fc\u306f18\u6b73\u4ee5\u4e0a\u3067\u3042\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\");\n        }\n\n        if (user is { Role: \"admin\", Age: &lt; 25 })\n        {\n            errors.Add(\"\u7ba1\u7406\u8005\u306f25\u6b73\u4ee5\u4e0a\u3067\u3042\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\");\n        }\n\n        return errors;\n    }\n}<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-22\">\u4f8b\u5916\u51e6\u7406\u3068\u306e\u7d44\u307f\u5408\u308f\u305b<\/h3>\n\n\n\n<p>is\u6f14\u7b97\u5b50\u3092\u4f8b\u5916\u51e6\u7406\u3068\u7d44\u307f\u5408\u308f\u305b\u308b\u3053\u3068\u3067\u3001\u3088\u308a\u5805\u7262\u306a\u30a8\u30e9\u30fc\u30cf\u30f3\u30c9\u30ea\u30f3\u30b0\u3092\u5b9f\u73fe\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=\"\">using System;\nusing System.Threading.Tasks;\n\npublic class ExceptionHandlingExample\n{\n    public class CustomException : Exception\n    {\n        public string ErrorCode { get; }\n        public CustomException(string message, string errorCode) \n            : base(message)\n        {\n            ErrorCode = errorCode;\n        }\n    }\n\n    public static async Task&lt;string&gt; ProcessDataWithErrorHandling()\n    {\n        try\n        {\n            await ProcessData();\n            return \"\u51e6\u7406\u304c\u5b8c\u4e86\u3057\u307e\u3057\u305f\";\n        }\n        catch (Exception ex)\n        {\n            return ex switch\n            {\n                CustomException { ErrorCode: var code }\n                    =&gt; $\"\u30ab\u30b9\u30bf\u30e0\u30a8\u30e9\u30fc\uff08\u30b3\u30fc\u30c9: {code}\uff09: {ex.Message}\",\n\n                InvalidOperationException\n                    =&gt; \"\u7121\u52b9\u306a\u64cd\u4f5c\u304c\u884c\u308f\u308c\u307e\u3057\u305f\",\n\n                _ =&gt; \"\u4e88\u671f\u3057\u306a\u3044\u30a8\u30e9\u30fc\u304c\u767a\u751f\u3057\u307e\u3057\u305f\"\n            };\n        }\n    }\n\n    private static Task ProcessData()\n    {\n        throw new CustomException(\"\u51e6\u7406\u30a8\u30e9\u30fc\", \"E001\");\n    }\n}<\/pre>\n\n\n\n<p>\u3053\u308c\u3089\u306e\u5b9f\u8df5\u7684\u306a\u30e6\u30fc\u30b9\u30b1\u30fc\u30b9\u306f\u3001is\u6f14\u7b97\u5b50\u3068\u30d1\u30bf\u30fc\u30f3\u30de\u30c3\u30c1\u30f3\u30b0\u306e\u5f37\u529b\u306a\u6a5f\u80fd\u3092\u6d3b\u7528\u3057\u3066\u3001\u3088\u308a\u4fdd\u5b88\u6027\u304c\u9ad8\u304f\u3001\u8aad\u307f\u3084\u3059\u3044\u30b3\u30fc\u30c9\u3092\u5b9f\u73fe\u3059\u308b\u65b9\u6cd5\u3092\u793a\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"i-23\">is\u6f14\u7b97\u5b50\u306e\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9<\/h2>\n\n\n\n<p>\u3053\u308c\u307e\u3067\u306e\u5185\u5bb9\u3092\u8e0f\u307e\u3048\u3001is\u6f14\u7b97\u5b50\u3092\u52b9\u679c\u7684\u306b\u6d3b\u7528\u3059\u308b\u305f\u3081\u306e\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9\u3092\u307e\u3068\u3081\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-24\">\u53ef\u8aad\u6027\u3092\u8003\u616e\u3057\u305f\u30d1\u30bf\u30fc\u30f3\u9078\u629e<\/h3>\n\n\n\n<p>\u53ef\u8aad\u6027\u306e\u9ad8\u3044\u30b3\u30fc\u30c9\u306f\u4fdd\u5b88\u6027\u3092\u5411\u4e0a\u3055\u305b\u3001\u30d0\u30b0\u306e\u65e9\u671f\u767a\u898b\u306b\u3082\u8ca2\u732e\u3057\u307e\u3059\u3002\u4ee5\u4e0b\u306b\u3001is\u6f14\u7b97\u5b50\u3092\u4f7f\u7528\u3059\u308b\u969b\u306e\u53ef\u8aad\u6027\u5411\u4e0a\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 ReadabilityExample\n{\n    \/\/ \u63a8\u5968\uff1a\u30d1\u30bf\u30fc\u30f3\u30de\u30c3\u30c1\u30f3\u30b0\u3092\u4f7f\u7528\u3057\u305f\u660e\u78ba\u306a\u6761\u4ef6\u5206\u5c90\n    public static string ProcessValue(object value)\n    {\n        return value switch\n        {\n            null =&gt; \"\u5024\u304c\u5b58\u5728\u3057\u307e\u305b\u3093\",\n            int n when n &lt; 0 =&gt; \"\u8ca0\u306e\u5024\u3067\u3059\",\n            int n =&gt; $\"\u6b63\u306e\u5024\u3067\u3059: {n}\",\n            string s =&gt; $\"\u6587\u5b57\u5217\u3067\u3059: {s}\",\n            _ =&gt; \"\u305d\u306e\u4ed6\u306e\u578b\u3067\u3059\"\n        };\n    }\n\n    \/\/ \u975e\u63a8\u5968\uff1a\u8907\u96d1\u306a\u6761\u4ef6\u306e\u9023\u9396\n    public static string ProcessValueBad(object value)\n    {\n        if (value == null) return \"\u5024\u304c\u5b58\u5728\u3057\u307e\u305b\u3093\";\n        if (value is int)\n        {\n            var num = (int)value;\n            if (num &lt; 0) return \"\u8ca0\u306e\u5024\u3067\u3059\";\n            return $\"\u6b63\u306e\u5024\u3067\u3059: {num}\";\n        }\n        if (value is string) return $\"\u6587\u5b57\u5217\u3067\u3059: {value}\";\n        return \"\u305d\u306e\u4ed6\u306e\u578b\u3067\u3059\";\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\">\u53ef\u8aad\u6027\u5411\u4e0a\u306e\u305f\u3081\u306e\u30ac\u30a4\u30c9\u30e9\u30a4\u30f3<\/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>\u9069\u5207\u306a\u9806\u5e8f\u3067\u306e\u6761\u4ef6\u914d\u7f6e<\/li>\n\n\n\n<li>\u660e\u78ba\u306a\u5909\u6570\u540d\u306e\u4f7f\u7528<\/li>\n\n\n\n<li>\u30d1\u30bf\u30fc\u30f3\u306e\u8ad6\u7406\u7684\u306a\u30b0\u30eb\u30fc\u30d7\u5316<\/li>\n\n\n\n<li>\u30b3\u30e1\u30f3\u30c8\u306b\u3088\u308b\u610f\u56f3\u306e\u8aac\u660e<\/li>\n\n\n\n<li>\u8907\u96d1\u306a\u6761\u4ef6\u306e\u5206\u5272<\/li>\n<\/ol>\n<\/div><\/div>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-25\">\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3092\u610f\u8b58\u3057\u305f\u5b9f\u88c5<\/h3>\n\n\n\n<p>\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3092\u6700\u9069\u5316\u3057\u3064\u3064\u3001is\u6f14\u7b97\u5b50\u3092\u52b9\u679c\u7684\u306b\u4f7f\u7528\u3059\u308b\u65b9\u6cd5\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=\"\">using System;\nusing System.Collections.Generic;\nusing System.Linq;\n\npublic class OptimizedImplementation\n{\n    public static IEnumerable&lt;string&gt; ProcessItems(IEnumerable&lt;object&gt; items)\n    {\n        \/\/ \u63a8\u5968\uff1a\u578b\u60c5\u5831\u306e\u30ad\u30e3\u30c3\u30b7\u30e5\u3068\u30d1\u30bf\u30fc\u30f3\u30de\u30c3\u30c1\u30f3\u30b0\u306e\u7d44\u307f\u5408\u308f\u305b\n        return items.Select(item =&gt; item switch\n        {\n            string s =&gt; $\"\u6587\u5b57\u5217: {s}\",\n            int n =&gt; $\"\u6570\u5024: {n}\",\n            DateTime d =&gt; $\"\u65e5\u4ed8: {d:yyyy\/MM\/dd}\",\n            _ =&gt; \"\u305d\u306e\u4ed6\"\n        });\n    }\n}<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-26\">\u4e00\u822c\u7684\u306a\u5b9f\u88c5\u30df\u30b9\u3068\u5bfe\u7b56<\/h3>\n\n\n\n<p>is\u6f14\u7b97\u5b50\u4f7f\u7528\u6642\u306b\u3088\u304f\u906d\u9047\u3059\u308b\u554f\u984c\u3068\u305d\u306e\u89e3\u6c7a\u65b9\u6cd5\u3092\u89e3\u8aac\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 CommonMistakesExample\n{\n    public class Animal { public string Name { get; set; } }\n    public class Dog : Animal { public string Breed { get; set; } }\n\n    public static class AnimalProcessor\n    {\n        \/\/ \u63a8\u5968\uff1a\u9069\u5207\u306a\u578b\u30c1\u30a7\u30c3\u30af\u3068\u30d1\u30bf\u30fc\u30f3\u30de\u30c3\u30c1\u30f3\u30b0\n        public static string ProcessAnimal(Animal animal)\n        {\n            return animal switch\n            {\n                Dog dog =&gt; $\"\u72ac\uff08{dog.Breed}\uff09: {dog.Name}\",\n                Animal a =&gt; $\"\u52d5\u7269: {a.Name}\",\n                null =&gt; \"\u52d5\u7269\u304c\u6307\u5b9a\u3055\u308c\u3066\u3044\u307e\u305b\u3093\",\n                _ =&gt; \"\u4e0d\u660e\u306a\u578b\"\n            };\n        }\n\n        \/\/ \u975e\u63a8\u5968\uff1a\u7d99\u627f\u95a2\u4fc2\u3092\u8003\u616e\u3057\u306a\u3044\u5b9f\u88c5\n        public static string ProcessAnimalBad(Animal animal)\n        {\n            if (animal.GetType() == typeof(Animal))\n            {\n                return $\"\u52d5\u7269: {animal.Name}\";\n            }\n            return \"\u4e0d\u660e\u306a\u52d5\u7269\";\n        }\n\n        \/\/ \u63a8\u5968\uff1anull\u30c1\u30a7\u30c3\u30af\u3092\u542b\u3080\u5b89\u5168\u306a\u5b9f\u88c5\n        public static bool IsDog(Animal animal)\n        {\n            return animal is Dog;  \/\/ null\u306e\u5834\u5408\u306ffalse\u3092\u8fd4\u3059\n        }\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\">\u4e3b\u306a\u5b9f\u88c5\u30df\u30b9\u3068\u5bfe\u7b56<\/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>\u7d99\u627f\u95a2\u4fc2\u306e\u8003\u616e\u6f0f\u308c\n<ul class=\"wp-block-list\">\n<li>\u5bfe\u7b56\uff1ais\u6f14\u7b97\u5b50\u3092\u4f7f\u7528\u3057\u305f\u9069\u5207\u306a\u578b\u30c1\u30a7\u30c3\u30af<\/li>\n\n\n\n<li>\u6d3e\u751f\u30af\u30e9\u30b9\u306e\u7279\u6027\u3092\u6d3b\u7528\u53ef\u80fd\u306a\u8a2d\u8a08<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li>null\u30c1\u30a7\u30c3\u30af\u306e\u6f0f\u308c\n<ul class=\"wp-block-list\">\n<li>\u5bfe\u7b56\uff1ais\u6f14\u7b97\u5b50\u306b\u3088\u308b\u5b89\u5168\u306a\u578b\u30c1\u30a7\u30c3\u30af<\/li>\n\n\n\n<li>null\u5b89\u5168\u6027\u3092\u8003\u616e\u3057\u305f\u5b9f\u88c5<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li>\u4e0d\u9069\u5207\u306a\u30d1\u30bf\u30fc\u30f3\u30de\u30c3\u30c1\u30f3\u30b0\n<ul class=\"wp-block-list\">\n<li>\u5bfe\u7b56\uff1a\u30d1\u30bf\u30fc\u30f3\u30de\u30c3\u30c1\u30f3\u30b0\u69cb\u6587\u306e\u9069\u5207\u306a\u4f7f\u7528<\/li>\n\n\n\n<li>\u5197\u9577\u306a\u30b3\u30fc\u30c9\u306e\u524a\u6e1b<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n<\/div><\/div>\n\n\n\n<p>\u3053\u308c\u3089\u306e\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9\u3092\u9069\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u3088\u308a\u5b89\u5168\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-27\">C# 12\u3067\u306e\u65b0\u6a5f\u80fd\u3068\u5c06\u6765\u5c55\u671b<\/h2>\n\n\n\n<p>\u3053\u308c\u307e\u3067\u8aac\u660e\u3057\u3066\u304d\u305fis\u6f14\u7b97\u5b50\u3068\u30d1\u30bf\u30fc\u30f3\u30de\u30c3\u30c1\u30f3\u30b0\u306e\u57fa\u672c\u7684\u306a\u4f7f\u3044\u65b9\u3092\u8e0f\u307e\u3048\u3001C# 12\u3067\u5c0e\u5165\u3055\u308c\u305f\u65b0\u6a5f\u80fd\u306b\u3064\u3044\u3066\u89e3\u8aac\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-28\">\u30ea\u30b9\u30c8\u30d1\u30bf\u30fc\u30f3\u306e\u5c0e\u5165\u3068\u6d3b\u7528<\/h3>\n\n\n\n<p>C# 12\u3067\u5c0e\u5165\u3055\u308c\u305f\u30ea\u30b9\u30c8\u30d1\u30bf\u30fc\u30f3\u306f\u3001\u914d\u5217\u3084\u30ea\u30b9\u30c8\u306e\u8981\u7d20\u3092\u76f4\u63a5\u30d1\u30bf\u30fc\u30f3\u30de\u30c3\u30c1\u30f3\u30b0\u3067\u304d\u308b\u5f37\u529b\u306a\u6a5f\u80fd\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=\"\">using System;\n\npublic class ListPatternExample\n{\n    public static string AnalyzeNumbers(int[] numbers)\n    {\n        return numbers switch\n        {\n            [] =&gt; \"\u7a7a\u306e\u914d\u5217\u3067\u3059\",\n            [var single] =&gt; $\"\u8981\u7d20\u304c1\u3064\u3067\u3059: {single}\",\n            [0, 1] =&gt; \"0\u304b\u3089\u59cb\u307e\u308b2\u8981\u7d20\u306e\u30b7\u30fc\u30b1\u30f3\u30b9\",\n            [var first, .., var last] =&gt; $\"\u6700\u521d: {first}, \u6700\u5f8c: {last}\",\n            [&gt; 0, &gt; 0, &gt; 0] =&gt; \"3\u3064\u306e\u6b63\u306e\u6570\",\n            _ =&gt; \"\u305d\u306e\u4ed6\u306e\u30d1\u30bf\u30fc\u30f3\"\n        };\n    }\n\n    \/\/ \u3088\u308a\u5b9f\u8df5\u7684\u306a\u30ea\u30b9\u30c8\u30d1\u30bf\u30fc\u30f3\u306e\u4f8b\n    public static string ValidateSequence&lt;T&gt;(IEnumerable&lt;T&gt; sequence)\n    {\n        return sequence switch\n        {\n            [var first, var second, .. var rest] when first.Equals(second) \n                =&gt; $\"\u6700\u521d\u306e2\u8981\u7d20\u304c\u540c\u3058: {first}, \u6b8b\u308a: {rest.Count()}\u500b\",\n            [_, _, _] =&gt; \"\u6b63\u78ba\u306b3\u8981\u7d20\",\n            [.., var last1, var last2] =&gt; $\"\u6700\u5f8c\u306e2\u8981\u7d20: {last1}, {last2}\",\n            _ =&gt; \"\u30d1\u30bf\u30fc\u30f3\u306b\u4e00\u81f4\u3057\u307e\u305b\u3093\"\n        };\n    }\n}<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-29\">\u30b9\u30d7\u30ec\u30c3\u30c9\u30d1\u30bf\u30fc\u30f3\u306e\u5b9f\u88c5\u4f8b<\/h3>\n\n\n\n<p>\u30b9\u30d7\u30ec\u30c3\u30c9\u30d1\u30bf\u30fc\u30f3\u3092\u4f7f\u7528\u3059\u308b\u3068\u3001\u914d\u5217\u3084\u30ea\u30b9\u30c8\u306e\u4e00\u90e8\u5206\u3092\u67d4\u8edf\u306b\u30de\u30c3\u30c1\u30f3\u30b0\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=\"\">using System;\n\npublic class SpreadPatternExample\n{\n    public record DataPoint(DateTime Timestamp, double Value);\n\n    public static string AnalyzeDataSeries(DataPoint[] data)\n    {\n        return data switch\n        {\n            [] =&gt; \"\u30c7\u30fc\u30bf\u304c\u3042\u308a\u307e\u305b\u3093\",\n            [var single] =&gt; $\"\u5358\u4e00\u306e\u30c7\u30fc\u30bf\u30dd\u30a4\u30f3\u30c8: {single.Value}\",\n            [var start, .., var end] when start.Value &lt; end.Value\n                =&gt; \"\u4e0a\u6607\u30c8\u30ec\u30f3\u30c9\"\n            [var first, var second, .. var middle, var last]\n                =&gt; $\"\u6700\u521d: {first.Value}, 2\u756a\u76ee: {second.Value}, \" +\n                   $\"\u4e2d\u9593: {middle.Length}\u500b, \u6700\u5f8c: {last.Value}\",\n            _ =&gt; \"\u305d\u306e\u4ed6\u306e\u30d1\u30bf\u30fc\u30f3\"\n        };\n    }\n}<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-30\">\u4eca\u5f8c\u8ffd\u52a0\u3055\u308c\u308b\u53ef\u80fd\u6027\u306e\u3042\u308b\u6a5f\u80fd<\/h3>\n\n\n\n<p>\u30d1\u30bf\u30fc\u30f3\u30de\u30c3\u30c1\u30f3\u30b0\u3068<code>is<\/code>\u6f14\u7b97\u5b50\u306b\u95a2\u3057\u3066\u3001\u5c06\u6765\u7684\u306b\u8ffd\u52a0\u304c\u671f\u5f85\u3055\u308c\u308b\u6a5f\u80fd\u3084\u6539\u5584\u70b9\u3092\u8003\u5bdf\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-31\">1. \u30d1\u30bf\u30fc\u30f3\u306e\u62e1\u5f35\u6a5f\u80fd<\/h4>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"csharp\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u6b63\u898f\u8868\u73fe\u30d1\u30bf\u30fc\u30f3\n\/\/ \u5c06\u6765\u7684\u306a\u69cb\u6587\u306e\u4f8b\uff08\u73fe\u6642\u70b9\u3067\u306f\u5b9f\u88c5\u3055\u308c\u3066\u3044\u307e\u305b\u3093\uff09\nif (text is Regex @\"^\\d{4}-\\d{2}-\\d{2}$\" date)\n{\n    \/\/ \u65e5\u4ed8\u5f62\u5f0f\u306b\u30de\u30c3\u30c1\u3059\u308b\u6587\u5b57\u5217\u306e\u51e6\u7406\n}<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-32\">2. \u30ab\u30b9\u30bf\u30e0\u30d1\u30bf\u30fc\u30f3\u306e\u30b5\u30dd\u30fc\u30c8<\/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=\"\">\/\/ \u30ab\u30b9\u30bf\u30e0\u30d1\u30bf\u30fc\u30f3\u306e\u5b9a\u7fa9\uff08\u6982\u5ff5\u7684\u306a\u4f8b\uff09\npublic class RangePattern&lt;T&gt; : IPattern&lt;T&gt; where T : IComparable&lt;T&gt;\n{\n    public T Min { get; }\n    public T Max { get; }\n\n    public bool Matches(T value)\n    {\n        return value.CompareTo(Min) &gt;= 0 &amp;&amp; value.CompareTo(Max) &lt;= 0;\n    }\n}<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-33\">3. \u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u306e\u6700\u9069\u5316<\/h4>\n\n\n\n<div class=\"wp-block-sgb-box sng-box box6\">\n<ul class=\"wp-block-list is-style-sango-list-simple\">\n<li>\u30b3\u30f3\u30d1\u30a4\u30eb\u6642\u306e\u578b\u30c1\u30a7\u30c3\u30af\u306e\u5f37\u5316<\/li>\n\n\n\n<li>\u30d1\u30bf\u30fc\u30f3\u30de\u30c3\u30c1\u30f3\u30b0\u306e\u30ad\u30e3\u30c3\u30b7\u30e5\u6a5f\u69cb<\/li>\n\n\n\n<li>JIT\u30b3\u30f3\u30d1\u30a4\u30e9\u306e\u6700\u9069\u5316<\/li>\n<\/ul>\n<\/div>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-34\">4. \u65b0\u3057\u3044\u30d1\u30bf\u30fc\u30f3\u306e\u7a2e\u985e<\/h4>\n\n\n\n<div class=\"wp-block-sgb-box sng-box box6\">\n<ul class=\"wp-block-list is-style-sango-list-simple\">\n<li>\u6570\u5024\u7bc4\u56f2\u30d1\u30bf\u30fc\u30f3<\/li>\n\n\n\n<li>\u8907\u5408\u7684\u306a\u6761\u4ef6\u30d1\u30bf\u30fc\u30f3<\/li>\n\n\n\n<li>\u30b3\u30ec\u30af\u30b7\u30e7\u30f3\u64cd\u4f5c\u30d1\u30bf\u30fc\u30f3<\/li>\n<\/ul>\n<\/div>\n\n\n\n<p>\u3053\u308c\u3089\u306e\u65b0\u6a5f\u80fd\u3068\u5c06\u6765\u7684\u306a\u5c55\u671b\u306f\u3001C#\u306e\u30d1\u30bf\u30fc\u30f3\u30de\u30c3\u30c1\u30f3\u30b0\u6a5f\u80fd\u3092\u3088\u308a\u5f37\u529b\u304b\u3064\u67d4\u8edf\u306b\u3057\u3001\u3088\u308a\u8868\u73fe\u529b\u8c4a\u304b\u306a\u30b3\u30fc\u30c9\u306e\u8a18\u8ff0\u3092\u53ef\u80fd\u306b\u3059\u308b\u3053\u3068\u304c\u671f\u5f85\u3055\u308c\u307e\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"i-35\">is\u6f14\u7b97\u5b50\u306e\u307e\u3068\u3081<\/h2>\n\n\n\n<p>is\u6f14\u7b97\u5b50\u3068\u30d1\u30bf\u30fc\u30f3\u30de\u30c3\u30c1\u30f3\u30b0\u3092\u9069\u5207\u306b\u6d3b\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u578b\u5b89\u5168\u3067\u4fdd\u5b88\u6027\u306e\u9ad8\u3044\u30b3\u30fc\u30c9\u3092\u5b9f\u73fe\u3067\u304d\u307e\u3059\u3002\u7279\u306bC# 12\u3067\u5c0e\u5165\u3055\u308c\u305f\u65b0\u6a5f\u80fd\u306b\u3088\u308a\u3001\u3088\u308a\u8868\u73fe\u529b\u8c4a\u304b\u306a\u30b3\u30fc\u30c9\u304c\u66f8\u3051\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3057\u305f\u3002<br>\u5b9f\u88c5\u6642\u306f\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3068\u53ef\u8aad\u6027\u306e\u30d0\u30e9\u30f3\u30b9\u3092\u8003\u616e\u3057\u3001\u72b6\u6cc1\u306b\u5fdc\u3058\u3066\u9069\u5207\u306a\u30d1\u30bf\u30fc\u30f3\u3092\u9078\u629e\u3059\u308b\u3053\u3068\u304c\u91cd\u8981\u3067\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<ul class=\"wp-block-list\">\n<li><strong>\u57fa\u672c\u6982\u5ff5\u306e\u7406\u89e3<\/strong>\n<ul class=\"wp-block-list\">\n<li>is\u6f14\u7b97\u5b50\u306e\u57fa\u672c\u7684\u306a\u5f79\u5272\u3068\u4f7f\u7528\u65b9\u6cd5<\/li>\n\n\n\n<li>\u5f93\u6765\u306e\u578b\u30c1\u30a7\u30c3\u30af\u65b9\u6cd5\u3068\u306e\u6bd4\u8f03<\/li>\n\n\n\n<li>\u30d1\u30bf\u30fc\u30f3\u30de\u30c3\u30c1\u30f3\u30b0\u306e\u57fa\u672c\u6982\u5ff5<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>\u5b9f\u8df5\u7684\u306a\u6d3b\u7528<\/strong>\n<ul 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