{"id":1466,"date":"2023-04-10T11:30:54","date_gmt":"2023-04-10T04:30:54","guid":{"rendered":"https:\/\/csharptutorial.net\/?page_id=1466"},"modified":"2024-12-14T22:39:01","modified_gmt":"2024-12-14T15:39:01","slug":"csharp-interface-segregation-principle","status":"publish","type":"page","link":"https:\/\/www.csharptutorial.net\/csharp-design-patterns\/csharp-interface-segregation-principle\/","title":{"rendered":"C# Interface Segregation Principle"},"content":{"rendered":"\n<p><strong>Summary<\/strong>: in this tutorial, you&#8217;ll learn about the C# Interface Segregation Principle (ISP) that promotes the idea of creating small and focused interfaces that are specific to the needs of clients.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Introduction to the C# Interface Segregation Principle<\/h2>\n\n\n\n<p>The interface segregation principle is the fourth principle in the five SOLID principles of object-oriented design:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><a href=\"https:\/\/csharptutorial.net\/csharp-design-patterns\/csharp-single-responsibility-principle\/\">Single Responsibility Principle (SRP)<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/csharptutorial.net\/csharp-design-patterns\/csharp-open-closed-principle\/\">Open-Closed Principle (OCP)<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/csharptutorial.net\/csharp-design-patterns\/csharp-liskov-substitution-principle\/\">Liskov Substitution Principle (LSP)<\/a><\/li>\n\n\n\n<li><strong>Interface Segregation Principle (ISP)&nbsp;<\/strong><\/li>\n\n\n\n<li><a href=\"https:\/\/csharptutorial.net\/csharp-design-patterns\/csharp-dependency-inversion-principle\/\">Dependency Inversion Principle (DIP)<\/a><\/li>\n<\/ul>\n\n\n\n<p>The interface segregation principle suggests that you should not force a client to implement an <a href=\"https:\/\/csharptutorial.net\/csharp-tutorial\/csharp-interface\/\">interface<\/a> that contains methods that it doesn&#8217;t need. <\/p>\n\n\n\n<p>Instead, it would help if you broke down large interfaces into smaller ones that are more focused and targeted to specific use cases.<\/p>\n\n\n\n<p>The interface segregation principle promotes creating <strong>small, cohesive interfaces<\/strong> specific to the client&#8217;s needs.<\/p>\n\n\n\n<p>Let&#8217;s take an example of violating the interface segregation principle:<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-1\" data-shcb-language-name=\"C#\" data-shcb-language-slug=\"cs\"><span><code class=\"hljs language-cs\"><span class=\"hljs-keyword\">namespace<\/span> <span class=\"hljs-title\">ISP<\/span>;\n\n<span class=\"hljs-keyword\">public<\/span> <span class=\"hljs-keyword\">interface<\/span> <span class=\"hljs-title\">IVehicle<\/span>\n{\n    <span class=\"hljs-function\"><span class=\"hljs-keyword\">void<\/span> <span class=\"hljs-title\">Run<\/span>(<span class=\"hljs-params\"><\/span>)<\/span>;\n    <span class=\"hljs-function\"><span class=\"hljs-keyword\">void<\/span> <span class=\"hljs-title\">Fly<\/span>(<span class=\"hljs-params\"><\/span>)<\/span>;\n    \n}\n\n<span class=\"hljs-keyword\">public<\/span> <span class=\"hljs-keyword\">class<\/span> <span class=\"hljs-title\">Aircraft<\/span> : <span class=\"hljs-title\">IVehicle<\/span>\n{\n    <span class=\"hljs-function\"><span class=\"hljs-keyword\">public<\/span> <span class=\"hljs-keyword\">void<\/span> <span class=\"hljs-title\">Run<\/span>(<span class=\"hljs-params\"><\/span>)<\/span> =&gt; Console.Write(<span class=\"hljs-string\">\"Running\"<\/span>);\n    <span class=\"hljs-function\"><span class=\"hljs-keyword\">public<\/span> <span class=\"hljs-keyword\">void<\/span> <span class=\"hljs-title\">Fly<\/span>(<span class=\"hljs-params\"><\/span>)<\/span> =&gt; Console.Write(<span class=\"hljs-string\">\"Flying\"<\/span>);\n}\n\n<span class=\"hljs-keyword\">public<\/span> <span class=\"hljs-keyword\">class<\/span> <span class=\"hljs-title\">Car<\/span>: <span class=\"hljs-title\">IVehicle<\/span>\n{\n    <span class=\"hljs-function\"><span class=\"hljs-keyword\">public<\/span> <span class=\"hljs-keyword\">void<\/span> <span class=\"hljs-title\">Run<\/span>(<span class=\"hljs-params\"><\/span>)<\/span> =&gt; Console.Write(<span class=\"hljs-string\">\"Running\"<\/span>);\n    <span class=\"hljs-function\"><span class=\"hljs-keyword\">public<\/span> <span class=\"hljs-keyword\">void<\/span> <span class=\"hljs-title\">Fly<\/span>(<span class=\"hljs-params\"><\/span>)<\/span> =&gt; <span class=\"hljs-keyword\">throw<\/span> <span class=\"hljs-keyword\">new<\/span> NotImplementedException();\n}\n\n<span class=\"hljs-keyword\">public<\/span> <span class=\"hljs-keyword\">class<\/span> <span class=\"hljs-title\">Program<\/span>\n{\n    <span class=\"hljs-function\"><span class=\"hljs-keyword\">public<\/span> <span class=\"hljs-keyword\">static<\/span> <span class=\"hljs-keyword\">void<\/span> <span class=\"hljs-title\">Main<\/span>(<span class=\"hljs-params\"><span class=\"hljs-keyword\">string<\/span>&#91;] args<\/span>)<\/span>\n    {\n        <span class=\"hljs-comment\">\/\/ aircraft <\/span>\n        <span class=\"hljs-keyword\">var<\/span> aircraft = <span class=\"hljs-keyword\">new<\/span> Aircraft();\n        aircraft.Run();\n        aircraft.Fly();\n\n        <span class=\"hljs-comment\">\/\/ car<\/span>\n        <span class=\"hljs-keyword\">var<\/span> car = <span class=\"hljs-keyword\">new<\/span> Car();    \n        car.Run();\n        \n        <span class=\"hljs-comment\">\/\/ cannot fly, exception<\/span>\n        car.Fly(); \n    }\n}<\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-1\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">C#<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">cs<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre>\n\n\n<p>How it works.<\/p>\n\n\n\n<p>First, define an interface <code>IVehicle<\/code> interface that has two methods <code>Run()<\/code> and <code>Fly()<\/code>:<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-2\" data-shcb-language-name=\"C#\" data-shcb-language-slug=\"cs\"><span><code class=\"hljs language-cs\"><span class=\"hljs-keyword\">public<\/span> <span class=\"hljs-keyword\">interface<\/span> <span class=\"hljs-title\">IVehicle<\/span>\n{\n    <span class=\"hljs-function\"><span class=\"hljs-keyword\">void<\/span> <span class=\"hljs-title\">Run<\/span>(<span class=\"hljs-params\"><\/span>)<\/span>;\n    <span class=\"hljs-function\"><span class=\"hljs-keyword\">void<\/span> <span class=\"hljs-title\">Fly<\/span>(<span class=\"hljs-params\"><\/span>)<\/span>;\n}<\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-2\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">C#<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">cs<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre>\n\n\n<p>Second, define an <code>Aircraft<\/code> class that implements the <code>IVehicle<\/code> interface:<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-3\" data-shcb-language-name=\"C#\" data-shcb-language-slug=\"cs\"><span><code class=\"hljs language-cs\"><span class=\"hljs-keyword\">public<\/span> <span class=\"hljs-keyword\">class<\/span> <span class=\"hljs-title\">Aircraft<\/span> : <span class=\"hljs-title\">IVehicle<\/span>\n{\n    <span class=\"hljs-function\"><span class=\"hljs-keyword\">public<\/span> <span class=\"hljs-keyword\">void<\/span> <span class=\"hljs-title\">Run<\/span>(<span class=\"hljs-params\"><\/span>)<\/span> =&gt; Console.Write(<span class=\"hljs-string\">\"Running\"<\/span>);\n    <span class=\"hljs-function\"><span class=\"hljs-keyword\">public<\/span> <span class=\"hljs-keyword\">void<\/span> <span class=\"hljs-title\">Fly<\/span>(<span class=\"hljs-params\"><\/span>)<\/span> =&gt; Console.Write(<span class=\"hljs-string\">\"Flying\"<\/span>);\n}<\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-3\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">C#<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">cs<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre>\n\n\n<p>Third, define a <code>Car<\/code> class that also implements the <code>IVehicle<\/code> interface. Since a regular car cannot fly, it <a href=\"https:\/\/csharptutorial.net\/csharp-tutorial\/csharp-throw-exception\/\">raises an exception<\/a> in the <code>Fly()<\/code> method:<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-4\" data-shcb-language-name=\"C#\" data-shcb-language-slug=\"cs\"><span><code class=\"hljs language-cs\"><span class=\"hljs-keyword\">public<\/span> <span class=\"hljs-keyword\">class<\/span> <span class=\"hljs-title\">Car<\/span>: <span class=\"hljs-title\">IVehicle<\/span>\n{\n    <span class=\"hljs-function\"><span class=\"hljs-keyword\">public<\/span> <span class=\"hljs-keyword\">void<\/span> <span class=\"hljs-title\">Run<\/span>(<span class=\"hljs-params\"><\/span>)<\/span> =&gt; Console.Write(<span class=\"hljs-string\">\"Running\"<\/span>);\n    <span class=\"hljs-function\"><span class=\"hljs-keyword\">public<\/span> <span class=\"hljs-keyword\">void<\/span> <span class=\"hljs-title\">Fly<\/span>(<span class=\"hljs-params\"><\/span>)<\/span> =&gt; <span class=\"hljs-keyword\">throw<\/span> <span class=\"hljs-keyword\">new<\/span> NotImplementedException();\n}<\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-4\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">C#<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">cs<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre>\n\n\n<p>Finally, create an <code>Aircraft<\/code> object and call the <code>Run()<\/code> and <code><code>Fly()<\/code><\/code> methods. But when we create a <code>Car<\/code> object and call the <code><code>Fly()<\/code><\/code> method, it raises an exception:<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-5\" data-shcb-language-name=\"C#\" data-shcb-language-slug=\"cs\"><span><code class=\"hljs language-cs\"><span class=\"hljs-keyword\">public<\/span> <span class=\"hljs-keyword\">class<\/span> <span class=\"hljs-title\">Program<\/span>\n{\n    <span class=\"hljs-function\"><span class=\"hljs-keyword\">public<\/span> <span class=\"hljs-keyword\">static<\/span> <span class=\"hljs-keyword\">void<\/span> <span class=\"hljs-title\">Main<\/span>(<span class=\"hljs-params\"><span class=\"hljs-keyword\">string<\/span>&#91;] args<\/span>)<\/span>\n    {\n        <span class=\"hljs-comment\">\/\/ aircraft <\/span>\n        <span class=\"hljs-keyword\">var<\/span> aircraft = <span class=\"hljs-keyword\">new<\/span> Aircraft();\n        aircraft.Run();\n        aircraft.Fly();\n\n        <span class=\"hljs-comment\">\/\/ car<\/span>\n        <span class=\"hljs-keyword\">var<\/span> car = <span class=\"hljs-keyword\">new<\/span> Car();    \n        car.Run();\n        \n        <span class=\"hljs-comment\">\/\/ cannot fly, exception<\/span>\n        car.Fly(); \n    }\n}<\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-5\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">C#<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">cs<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre>\n\n\n<p>This is an example of violating the Interface Segregation Principle because the <code>IVehicle<\/code> forces the <code>Car<\/code> class to use the <code>Fly()<\/code> method that it doesn&#8217;t need.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Refactoring the program to conform with the Interface Segregation Principle<\/h2>\n\n\n\n<p>To fix the issue of violating the interface segregation principle, you need to break down the large interface into smaller ones. <\/p>\n\n\n\n<p>First, segregate the <code>IVehicle<\/code> interface into two smaller interfaces <code>IFlyable<\/code> and <code>IRunnable<\/code>:<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-6\" data-shcb-language-name=\"C#\" data-shcb-language-slug=\"cs\"><span><code class=\"hljs language-cs\"><span class=\"hljs-keyword\">public<\/span> <span class=\"hljs-keyword\">interface<\/span> <span class=\"hljs-title\">IFlyable<\/span>\n{\n    <span class=\"hljs-function\"><span class=\"hljs-keyword\">void<\/span> <span class=\"hljs-title\">Fly<\/span>(<span class=\"hljs-params\"><\/span>)<\/span>;\n}\n<span class=\"hljs-keyword\">public<\/span> <span class=\"hljs-keyword\">interface<\/span> <span class=\"hljs-title\">IRunnable<\/span>\n{\n    <span class=\"hljs-function\"><span class=\"hljs-keyword\">void<\/span> <span class=\"hljs-title\">Run<\/span>(<span class=\"hljs-params\"><\/span>)<\/span>;\n}<\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-6\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">C#<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">cs<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre>\n\n\n<p>Second, define the <code>Aircraft<\/code> class that implements both interfaces since the <code>Aircraft<\/code> class needs both <code>Run()<\/code> and <code>Fly()<\/code> methods:<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-7\" data-shcb-language-name=\"C#\" data-shcb-language-slug=\"cs\"><span><code class=\"hljs language-cs\"><span class=\"hljs-keyword\">public<\/span> <span class=\"hljs-keyword\">class<\/span> <span class=\"hljs-title\">Aircraft<\/span> : <span class=\"hljs-title\">IRunnable<\/span>, <span class=\"hljs-title\">IFlyable<\/span>\n{\n    <span class=\"hljs-function\"><span class=\"hljs-keyword\">public<\/span> <span class=\"hljs-keyword\">void<\/span> <span class=\"hljs-title\">Run<\/span>(<span class=\"hljs-params\"><\/span>)<\/span> =&gt; Console.Write(<span class=\"hljs-string\">\"Running\"<\/span>);\n    <span class=\"hljs-function\"><span class=\"hljs-keyword\">public<\/span> <span class=\"hljs-keyword\">void<\/span> <span class=\"hljs-title\">Fly<\/span>(<span class=\"hljs-params\"><\/span>)<\/span> =&gt; Console.Write(<span class=\"hljs-string\">\"Flying\"<\/span>);\n}<\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-7\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">C#<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">cs<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre>\n\n\n<p>Third, define the <code>Car<\/code> class that implements only the <code>IRunnable<\/code> interface because it only needs the <code>Run()<\/code> method:<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-8\" data-shcb-language-name=\"C#\" data-shcb-language-slug=\"cs\"><span><code class=\"hljs language-cs\"><span class=\"hljs-keyword\">public<\/span> <span class=\"hljs-keyword\">class<\/span> <span class=\"hljs-title\">Car<\/span>: <span class=\"hljs-title\">IRunnable<\/span>\n{\n    <span class=\"hljs-function\"><span class=\"hljs-keyword\">public<\/span> <span class=\"hljs-keyword\">void<\/span> <span class=\"hljs-title\">Run<\/span>(<span class=\"hljs-params\"><\/span>)<\/span> =&gt; Console.Write(<span class=\"hljs-string\">\"Running\"<\/span>);\n}<\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-8\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">C#<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">cs<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre>\n\n\n<p>Finally, create <code>Aircraft<\/code> and <code>Car<\/code> objects and call their methods respectively in the <code>Main()<\/code> method of the <code>Program<\/code> class:<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-9\" data-shcb-language-name=\"C#\" data-shcb-language-slug=\"cs\"><span><code class=\"hljs language-cs\"><span class=\"hljs-keyword\">public<\/span> <span class=\"hljs-keyword\">class<\/span> <span class=\"hljs-title\">Program<\/span>\n{\n    <span class=\"hljs-function\"><span class=\"hljs-keyword\">public<\/span> <span class=\"hljs-keyword\">static<\/span> <span class=\"hljs-keyword\">void<\/span> <span class=\"hljs-title\">Main<\/span>(<span class=\"hljs-params\"><span class=\"hljs-keyword\">string<\/span>&#91;] args<\/span>)<\/span>\n    {\n        <span class=\"hljs-comment\">\/\/ aircraft <\/span>\n        <span class=\"hljs-keyword\">var<\/span> aircraft = <span class=\"hljs-keyword\">new<\/span> Aircraft();\n        aircraft.Run();\n        aircraft.Fly();\n\n        <span class=\"hljs-comment\">\/\/ car<\/span>\n        <span class=\"hljs-keyword\">var<\/span> car = <span class=\"hljs-keyword\">new<\/span> Car();    \n        car.Run();        \n  \n    }\n}<\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-9\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">C#<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">cs<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre>\n\n\n<p>Put it all together.<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-10\" data-shcb-language-name=\"C#\" data-shcb-language-slug=\"cs\"><span><code class=\"hljs language-cs\"><span class=\"hljs-keyword\">namespace<\/span> <span class=\"hljs-title\">ISP<\/span>;\n\n<span class=\"hljs-keyword\">public<\/span> <span class=\"hljs-keyword\">interface<\/span> <span class=\"hljs-title\">IFlyable<\/span>\n{\n    <span class=\"hljs-function\"><span class=\"hljs-keyword\">void<\/span> <span class=\"hljs-title\">Fly<\/span>(<span class=\"hljs-params\"><\/span>)<\/span>;\n}\n<span class=\"hljs-keyword\">public<\/span> <span class=\"hljs-keyword\">interface<\/span> <span class=\"hljs-title\">IRunnable<\/span>\n{\n    <span class=\"hljs-function\"><span class=\"hljs-keyword\">void<\/span> <span class=\"hljs-title\">Run<\/span>(<span class=\"hljs-params\"><\/span>)<\/span>;\n}\n\n<span class=\"hljs-keyword\">public<\/span> <span class=\"hljs-keyword\">class<\/span> <span class=\"hljs-title\">Aircraft<\/span> : <span class=\"hljs-title\">IRunnable<\/span>, <span class=\"hljs-title\">IFlyable<\/span>\n{\n    <span class=\"hljs-function\"><span class=\"hljs-keyword\">public<\/span> <span class=\"hljs-keyword\">void<\/span> <span class=\"hljs-title\">Run<\/span>(<span class=\"hljs-params\"><\/span>)<\/span> =&gt; Console.Write(<span class=\"hljs-string\">\"Running\"<\/span>);\n    <span class=\"hljs-function\"><span class=\"hljs-keyword\">public<\/span> <span class=\"hljs-keyword\">void<\/span> <span class=\"hljs-title\">Fly<\/span>(<span class=\"hljs-params\"><\/span>)<\/span> =&gt; Console.Write(<span class=\"hljs-string\">\"Flying\"<\/span>);\n}\n\n<span class=\"hljs-keyword\">public<\/span> <span class=\"hljs-keyword\">class<\/span> <span class=\"hljs-title\">Car<\/span>: <span class=\"hljs-title\">IRunnable<\/span>\n{\n    <span class=\"hljs-function\"><span class=\"hljs-keyword\">public<\/span> <span class=\"hljs-keyword\">void<\/span> <span class=\"hljs-title\">Run<\/span>(<span class=\"hljs-params\"><\/span>)<\/span> =&gt; Console.Write(<span class=\"hljs-string\">\"Running\"<\/span>);\n}\n\n<span class=\"hljs-keyword\">public<\/span> <span class=\"hljs-keyword\">class<\/span> <span class=\"hljs-title\">Program<\/span>\n{\n    <span class=\"hljs-function\"><span class=\"hljs-keyword\">public<\/span> <span class=\"hljs-keyword\">static<\/span> <span class=\"hljs-keyword\">void<\/span> <span class=\"hljs-title\">Main<\/span>(<span class=\"hljs-params\"><span class=\"hljs-keyword\">string<\/span>&#91;] args<\/span>)<\/span>\n    {\n        <span class=\"hljs-comment\">\/\/ aircraft <\/span>\n        <span class=\"hljs-keyword\">var<\/span> aircraft = <span class=\"hljs-keyword\">new<\/span> Aircraft();\n        aircraft.Run();\n        aircraft.Fly();\n\n        <span class=\"hljs-comment\">\/\/ car<\/span>\n        <span class=\"hljs-keyword\">var<\/span> car = <span class=\"hljs-keyword\">new<\/span> Car();    \n        car.Run();        \n    }\n}<\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-10\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">C#<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">cs<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre>\n\n\n<h2 class=\"wp-block-heading\">Summary<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>C# Interface Segregation Principle (ISP) advocates small, client-specific interfaces.<\/li>\n<\/ul>\n<div class=\"helpful-block-content\" data-title=\"\">\n\t<header>\n\t\t<div class=\"wth-question\">Was this tutorial helpful ?<\/div>\n\t\t<div class=\"wth-thumbs\">\n\t\t\t<button\n\t\t\t\tdata-post=\"1466\"\n\t\t\t\tdata-post-url=\"https:\/\/www.csharptutorial.net\/csharp-design-patterns\/csharp-interface-segregation-principle\/\"\n\t\t\t\tdata-post-title=\"C# Interface Segregation Principle\"\n\t\t\t\tdata-response=\"1\"\n\t\t\t\tclass=\"wth-btn-rounded wth-yes-btn\"\n\t\t\t>\n\t\t\t\t<svg\n\t\t\t\t\txmlns=\"http:\/\/www.w3.org\/2000\/svg\"\n\t\t\t\t\tviewBox=\"0 0 24 24\"\n\t\t\t\t\tfill=\"none\"\n\t\t\t\t\tstroke=\"currentColor\"\n\t\t\t\t\tstroke-width=\"2\"\n\t\t\t\t\tstroke-linecap=\"round\"\n\t\t\t\t\tstroke-linejoin=\"round\"\n\t\t\t\t\tclass=\"feather feather-thumbs-up block w-full h-full\"\n\t\t\t\t>\n\t\t\t\t\t<path\n\t\t\t\t\t\td=\"M14 9V5a3 3 0 0 0-3-3l-4 9v11h11.28a2 2 0 0 0 2-1.7l1.38-9a2 2 0 0 0-2-2.3zM7 22H4a2 2 0 0 1-2-2v-7a2 2 0 0 1 2-2h3\"\n\t\t\t\t\t><\/path>\n\t\t\t\t<\/svg>\n\t\t\t\t<span class=\"sr-only\"> Yes <\/span>\n\t\t\t<\/button>\n\n\t\t\t<button\n\t\t\t\tdata-response=\"0\"\n\t\t\t\tdata-post=\"1466\"\n\t\t\t\tdata-post-url=\"https:\/\/www.csharptutorial.net\/csharp-design-patterns\/csharp-interface-segregation-principle\/\"\n\t\t\t\tdata-post-title=\"C# Interface Segregation Principle\"\n\t\t\t\tclass=\"wth-btn-rounded wth-no-btn\"\n\t\t\t>\n\t\t\t\t<svg\n\t\t\t\t\txmlns=\"http:\/\/www.w3.org\/2000\/svg\"\n\t\t\t\t\tviewBox=\"0 0 24 24\"\n\t\t\t\t\tfill=\"none\"\n\t\t\t\t\tstroke=\"currentColor\"\n\t\t\t\t\tstroke-width=\"2\"\n\t\t\t\t\tstroke-linecap=\"round\"\n\t\t\t\t\tstroke-linejoin=\"round\"\n\t\t\t\t>\n\t\t\t\t\t<path\n\t\t\t\t\t\td=\"M10 15v4a3 3 0 0 0 3 3l4-9V2H5.72a2 2 0 0 0-2 1.7l-1.38 9a2 2 0 0 0 2 2.3zm7-13h2.67A2.31 2.31 0 0 1 22 4v7a2.31 2.31 0 0 1-2.33 2H17\"\n\t\t\t\t\t><\/path>\n\t\t\t\t<\/svg>\n\t\t\t\t<span class=\"sr-only\"> No <\/span>\n\t\t\t<\/button>\n\t\t<\/div>\n\t<\/header>\n\n\t<div class=\"wth-form hidden\">\n\t\t<div class=\"wth-form-wrapper\">\n\t\t\t<div class=\"wth-title\"><\/div>\n\t\t\t\n\t\t\t<textarea class=\"wth-message\"><\/textarea>\n\n\t\t\t<button class=\"btn btn-primary wth-btn-submit\">Send<\/button>\n\t\t\t<button class=\"btn wth-btn-cancel\">Cancel<\/button>\n\t\t\n\t\t<\/div>\n\t<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>C# Interface Segregation Principle promotes the idea of creating small and focused interfaces that are specific to the needs of clients.<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":1441,"menu_order":3,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-1466","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.csharptutorial.net\/wp-json\/wp\/v2\/pages\/1466","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.csharptutorial.net\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/www.csharptutorial.net\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/www.csharptutorial.net\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.csharptutorial.net\/wp-json\/wp\/v2\/comments?post=1466"}],"version-history":[{"count":5,"href":"https:\/\/www.csharptutorial.net\/wp-json\/wp\/v2\/pages\/1466\/revisions"}],"predecessor-version":[{"id":2709,"href":"https:\/\/www.csharptutorial.net\/wp-json\/wp\/v2\/pages\/1466\/revisions\/2709"}],"up":[{"embeddable":true,"href":"https:\/\/www.csharptutorial.net\/wp-json\/wp\/v2\/pages\/1441"}],"wp:attachment":[{"href":"https:\/\/www.csharptutorial.net\/wp-json\/wp\/v2\/media?parent=1466"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}