{"id":195111,"date":"2025-02-25T19:31:17","date_gmt":"2025-02-25T19:31:17","guid":{"rendered":"https:\/\/learnexams.com\/blog\/?p=195111"},"modified":"2025-02-25T19:31:21","modified_gmt":"2025-02-25T19:31:21","slug":"extension-methods-implement-an-extension-method-for-built-in-class-stringbuilder-to-count-the-number-of-words-contained-in-a-stringbuilder-object","status":"publish","type":"post","link":"https:\/\/www.learnexams.com\/blog\/2025\/02\/25\/extension-methods-implement-an-extension-method-for-built-in-class-stringbuilder-to-count-the-number-of-words-contained-in-a-stringbuilder-object\/","title":{"rendered":"Extension Methods Implement an extension method for built-in class StringBuilder to count the number of words contained in a StringBuilder object"},"content":{"rendered":"\n<p>Extension Methods<\/p>\n\n\n\n<p>Implement an extension method for built-in class StringBuilder to count the number of words contained in a StringBuilder object.<\/p>\n\n\n\n<p>For example, if a StringBuilder object strobj =&#8221;This is to test whether the extension method count can return a right answer or not&#8221;,the number of words contained in strobj is 16.<\/p>\n\n\n\n<p>Or if strobj = &#8220;You can define extension methods for user defined types as well as predefined types&#8221;, then it<\/p>\n\n\n\n<p>will return the result -14<\/p>\n\n\n\n<p><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-ast-global-color-6-color\">The correct answer and explanation is:<\/mark><\/strong><\/p>\n\n\n\n<p>Here&#8217;s the correct implementation of an extension method for the <code>StringBuilder<\/code> class in C# to count the number of words in a <code>StringBuilder<\/code> object.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">C# Code:<\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code>using System;\nusing System.Text;\nusing System.Linq;\n\npublic static class StringBuilderExtensions\n{\n    public static int WordCount(this StringBuilder sb)\n    {\n        if (sb == null || sb.Length == 0)\n            return 0;\n\n        return sb.ToString()\n                 .Split(new char&#91;] { ' ', '\\t', '\\n', '\\r' }, StringSplitOptions.RemoveEmptyEntries)\n                 .Length;\n    }\n}\n\nclass Program\n{\n    static void Main()\n    {\n        StringBuilder strobj1 = new StringBuilder(\"This is to test whether the extension method count can return a right answer or not\");\n        Console.WriteLine($\"Word Count: {strobj1.WordCount()}\"); \/\/ Output: 16\n\n        StringBuilder strobj2 = new StringBuilder(\"You can define extension methods for user defined types as well as predefined types\");\n        Console.WriteLine($\"Word Count: {strobj2.WordCount()}\"); \/\/ Output: 14\n    }\n}\n<\/code><\/pre>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">Explanation <\/h3>\n\n\n\n<p>In C#, an <strong>extension method<\/strong> allows us to add new methods to existing types without modifying them directly. Here, we define an extension method for the <code>StringBuilder<\/code> class to count the number of words in its content.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\"><strong>Steps to Implement the Extension Method<\/strong><\/h4>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>Create a Static Class<\/strong><br>Extension methods must be defined inside a <code>static<\/code> class. We create <code>StringBuilderExtensions<\/code> for this purpose.<\/li>\n\n\n\n<li><strong>Define the Extension Method<\/strong>\n<ul class=\"wp-block-list\">\n<li>The method <code>WordCount<\/code> is declared as <code>public static<\/code>.<\/li>\n\n\n\n<li>It takes a <code>this StringBuilder sb<\/code> parameter to extend the <code>StringBuilder<\/code> class.<\/li>\n\n\n\n<li>If <code>sb<\/code> is <code>null<\/code> or empty, it returns <code>0<\/code>.<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>Convert StringBuilder to String<\/strong><br>Since <code>StringBuilder<\/code> does not have built-in support for string operations like <code>Split<\/code>, we use <code>sb.ToString()<\/code> to get a <code>string<\/code>.<\/li>\n\n\n\n<li><strong>Split the String into Words<\/strong><br>We use <code>.Split(new char[] { ' ', '\\t', '\\n', '\\r' }, StringSplitOptions.RemoveEmptyEntries)<\/code>.\n<ul class=\"wp-block-list\">\n<li>This splits the string based on whitespace characters: space, tab, newline, and carriage return.<\/li>\n\n\n\n<li><code>StringSplitOptions.RemoveEmptyEntries<\/code> ensures that multiple spaces or empty strings are ignored.<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>Count the Words<\/strong>\n<ul class=\"wp-block-list\">\n<li>The <code>.Length<\/code> property of the resulting array gives the total number of words.<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n\n\n\n<h4 class=\"wp-block-heading\"><strong>Why Use an Extension Method?<\/strong><\/h4>\n\n\n\n<ul class=\"wp-block-list\">\n<li>It improves <strong>code readability<\/strong> and makes <code>StringBuilder<\/code> more powerful.<\/li>\n\n\n\n<li>Avoids converting <code>StringBuilder<\/code> to <code>string<\/code> every time in different parts of the program.<\/li>\n\n\n\n<li>Reusable for any <code>StringBuilder<\/code> instance.<\/li>\n<\/ul>\n\n\n\n<h4 class=\"wp-block-heading\"><strong>Output Validation<\/strong><\/h4>\n\n\n\n<p>For:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>StringBuilder strobj1 = new StringBuilder(\"This is to test whether the extension method count can return a right answer or not\");\n<\/code><\/pre>\n\n\n\n<p>The output is <code>16<\/code>, which is correct.<\/p>\n\n\n\n<p>For:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>StringBuilder strobj2 = new StringBuilder(\"You can define extension methods for user defined types as well as predefined types\");\n<\/code><\/pre>\n\n\n\n<p>The output is <code>14<\/code>, which is also correct.<\/p>\n\n\n\n<p>This method efficiently counts words in a <code>StringBuilder<\/code> object using built-in .NET functionalities.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<p>Now, I&#8217;ll generate an image related to this topic.<\/p>\n\n\n\n<p>Here is the conceptual illustration of C# extension methods, visually representing a futuristic digital interface where code snippets float in the air, highlighting the word count process in a floating digital console. Let me know if you need any modifications! \ud83d\ude80<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" src=\"https:\/\/learnexams.com\/blog\/wp-content\/uploads\/2025\/02\/image-1533.png\" alt=\"\" class=\"wp-image-195112\"\/><\/figure>\n","protected":false},"excerpt":{"rendered":"<p>Extension Methods Implement an extension method for built-in class StringBuilder to count the number of words contained in a StringBuilder object. For example, if a StringBuilder object strobj =&#8221;This is to test whether the extension method count can return a right answer or not&#8221;,the number of words contained in strobj is 16. Or if strobj [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[25],"tags":[],"class_list":["post-195111","post","type-post","status-publish","format-standard","hentry","category-exams-certification"],"_links":{"self":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/195111","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/comments?post=195111"}],"version-history":[{"count":0,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/195111\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/media?parent=195111"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/categories?post=195111"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/tags?post=195111"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}