{"id":5802,"date":"2022-04-07T04:22:11","date_gmt":"2022-04-07T04:22:11","guid":{"rendered":"https:\/\/studysection.com\/blog\/?p=5802"},"modified":"2022-04-07T06:52:41","modified_gmt":"2022-04-07T06:52:41","slug":"singleton-design-pattern","status":"publish","type":"post","link":"https:\/\/studysection.com\/blog\/singleton-design-pattern\/","title":{"rendered":"Singleton Design Pattern"},"content":{"rendered":"<p>Design patterns provide solutions to the commonly occurring problems in the design of the software. The design pattern is like a blueprint that can be customized to target any particular problem of the code. Patterns are a toolkit of solutions to address common problems in software design. They provide the team with a common language to communicate efficiently.<\/p>\n<p>Singleton design pattern in C# is one of the most widely used design <a href=\"https:\/\/studysection.com\/blog\/bridge-design-pattern\/\">patterns<\/a>. In this pattern, only one instance of a class is created and it becomes a global point from where that class can be accessed. In simple words, a singleton is a class where only a single instance of the class is created and that access has simple access to the class.<\/p>\n<p><strong>Singleton pattern can be implemented in various ways in C#. Common characteristics of a singleton pattern are as follows.<\/strong><\/p>\n<ul>\n<li>Private and parameterless single constructor.<\/li>\n<li>Sealed class.<\/li>\n<li>Static variable to hold a reference to the single created instance.<\/li>\n<li>A public and static way of getting the reference to the created instance.<\/li>\n<\/ul>\n<h2>Advantages of Singleton Design Pattern are listed below:<\/h2>\n<ul>\n<li>Singleton patterns can implement interfaces.<\/li>\n<li>It has Static Initialization and can be lazy-loaded.<\/li>\n<li>It helps to hide dependencies.<\/li>\n<li>It is easy to maintain as it provides a single point of access to a particular instance.<\/li>\n<\/ul>\n<p><strong>There are a few disadvantages of using the singleton pattern which are mentioned below:<\/strong><\/p>\n<ul>\n<li>Unit testing of the application becomes a bit difficult as it introduces a global state into an application.<\/li>\n<li>Parallelism within the program also gets affected due to the dependency on a single instance.<\/li>\n<\/ul>\n<h3>Singleton class vs. Static methods:<\/h3>\n<p>Classes with static methods cannot be initialized. We can reference a static method with the name of the class. The same copy of that static method is shared between every reference. So, changes made by one will be reflected in another. <\/p>\n<p><strong>Comparison is listed below between Singleton class and Static methods<\/strong><\/p>\n<ul>\n<li>We can extend a singleton class but we can not extend a static Class.<\/li>\n<li>We can initialize a singleton class but a Static Class cannot be initialized.<\/li>\n<li>When the program containing the static class is loaded, then that static class is loaded automatically by the CLR.<\/li>\n<\/ul>\n<p><strong>Singleton Pattern can be implemented in several ways in C# as listed below:<\/strong><\/p>\n<ul>\n<li>No Thread Safe Singleton.<\/li>\n<li>Thread-Safety Singleton.<\/li>\n<li>Thread-Safety Singleton using Double-Check Locking.<\/li>\n<li>Thread-safe without a lock.<\/li>\n<li>Using .NET 4&#8217;s Lazy&lt;T> type.<\/li>\n<\/ul>\n<p><small><em>The English language is the most widely used language as a medium of communication around the world. Having a certification for the English language can be an advantage. StudySection provides an <a href=\"https:\/\/www.studysection.com\/english-language-advanced-diploma\">English Certification Exam<\/a> that tests English language proficiency in English grammar, reading, and writing.<\/em><\/small><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Design patterns provide solutions to the commonly occurring problems in the design of the software. The design pattern is like<\/p>\n","protected":false},"author":1,"featured_media":5803,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[6],"tags":[142,747],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v21.7 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Singleton design pattern - StudySection Blog<\/title>\n<meta name=\"description\" content=\"Singleton design pattern in C# is one of the most widely used design patterns. In this pattern, only one instance of a class is created\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/studysection.com\/blog\/singleton-design-pattern\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Singleton design pattern - StudySection Blog\" \/>\n<meta property=\"og:description\" content=\"Singleton design pattern in C# is one of the most widely used design patterns. In this pattern, only one instance of a class is created\" \/>\n<meta property=\"og:url\" content=\"https:\/\/studysection.com\/blog\/singleton-design-pattern\/\" \/>\n<meta property=\"og:site_name\" content=\"Blog Posts on famous people, innovations and educational topics\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/studysection\" \/>\n<meta property=\"article:published_time\" content=\"2022-04-07T04:22:11+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2022-04-07T06:52:41+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/studysection.com\/blog\/wp-content\/uploads\/2022\/04\/Singleton-design.png\" \/>\n\t<meta property=\"og:image:width\" content=\"300\" \/>\n\t<meta property=\"og:image:height\" content=\"200\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/png\" \/>\n<meta name=\"author\" content=\"admin-studysection-blog\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:creator\" content=\"@studysection\" \/>\n<meta name=\"twitter:site\" content=\"@studysection\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"admin-studysection-blog\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"2 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/studysection.com\/blog\/singleton-design-pattern\/#article\",\"isPartOf\":{\"@id\":\"https:\/\/studysection.com\/blog\/singleton-design-pattern\/\"},\"author\":{\"name\":\"admin-studysection-blog\",\"@id\":\"https:\/\/studysection.com\/blog\/#\/schema\/person\/db367e2c29a12d1808fb1979edb3d402\"},\"headline\":\"Singleton Design Pattern\",\"datePublished\":\"2022-04-07T04:22:11+00:00\",\"dateModified\":\"2022-04-07T06:52:41+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/studysection.com\/blog\/singleton-design-pattern\/\"},\"wordCount\":448,\"commentCount\":0,\"publisher\":{\"@id\":\"https:\/\/studysection.com\/blog\/#organization\"},\"keywords\":[\"C\",\"Singleton\"],\"articleSection\":[\"Learn and Grow\"],\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\/\/studysection.com\/blog\/singleton-design-pattern\/#respond\"]}]},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/studysection.com\/blog\/singleton-design-pattern\/\",\"url\":\"https:\/\/studysection.com\/blog\/singleton-design-pattern\/\",\"name\":\"Singleton design pattern - StudySection Blog\",\"isPartOf\":{\"@id\":\"https:\/\/studysection.com\/blog\/#website\"},\"datePublished\":\"2022-04-07T04:22:11+00:00\",\"dateModified\":\"2022-04-07T06:52:41+00:00\",\"description\":\"Singleton design pattern in C# is one of the most widely used design patterns. In this pattern, only one instance of a class is created\",\"breadcrumb\":{\"@id\":\"https:\/\/studysection.com\/blog\/singleton-design-pattern\/#breadcrumb\"},\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/studysection.com\/blog\/singleton-design-pattern\/\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/studysection.com\/blog\/singleton-design-pattern\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\/\/studysection.com\/blog\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Singleton Design Pattern\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\/\/studysection.com\/blog\/#website\",\"url\":\"https:\/\/studysection.com\/blog\/\",\"name\":\"Blog Posts on famous people, innovations and educational topics\",\"description\":\"\",\"publisher\":{\"@id\":\"https:\/\/studysection.com\/blog\/#organization\"},\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\/\/studysection.com\/blog\/?s={search_term_string}\"},\"query-input\":\"required name=search_term_string\"}],\"inLanguage\":\"en-US\"},{\"@type\":\"Organization\",\"@id\":\"https:\/\/studysection.com\/blog\/#organization\",\"name\":\"StudySection\",\"url\":\"https:\/\/studysection.com\/blog\/\",\"logo\":{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\/\/studysection.com\/blog\/#\/schema\/logo\/image\/\",\"url\":\"https:\/\/studysection.com\/blog\/wp-content\/uploads\/2021\/10\/studySection-logo.png\",\"contentUrl\":\"https:\/\/studysection.com\/blog\/wp-content\/uploads\/2021\/10\/studySection-logo.png\",\"width\":920,\"height\":440,\"caption\":\"StudySection\"},\"image\":{\"@id\":\"https:\/\/studysection.com\/blog\/#\/schema\/logo\/image\/\"},\"sameAs\":[\"https:\/\/www.facebook.com\/studysection\",\"https:\/\/twitter.com\/studysection\",\"https:\/\/www.instagram.com\/study.section\/\",\"https:\/\/www.linkedin.com\/company\/studysection\"]},{\"@type\":\"Person\",\"@id\":\"https:\/\/studysection.com\/blog\/#\/schema\/person\/db367e2c29a12d1808fb1979edb3d402\",\"name\":\"admin-studysection-blog\",\"image\":{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\/\/studysection.com\/blog\/#\/schema\/person\/image\/\",\"url\":\"https:\/\/secure.gravatar.com\/avatar\/054ac87a6874df1932004239cd8eab36?s=96&d=mm&r=g\",\"contentUrl\":\"https:\/\/secure.gravatar.com\/avatar\/054ac87a6874df1932004239cd8eab36?s=96&d=mm&r=g\",\"caption\":\"admin-studysection-blog\"},\"url\":\"https:\/\/studysection.com\/blog\/author\/admin-studysection-blog\/\"}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"Singleton design pattern - StudySection Blog","description":"Singleton design pattern in C# is one of the most widely used design patterns. In this pattern, only one instance of a class is created","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/studysection.com\/blog\/singleton-design-pattern\/","og_locale":"en_US","og_type":"article","og_title":"Singleton design pattern - StudySection Blog","og_description":"Singleton design pattern in C# is one of the most widely used design patterns. In this pattern, only one instance of a class is created","og_url":"https:\/\/studysection.com\/blog\/singleton-design-pattern\/","og_site_name":"Blog Posts on famous people, innovations and educational topics","article_publisher":"https:\/\/www.facebook.com\/studysection","article_published_time":"2022-04-07T04:22:11+00:00","article_modified_time":"2022-04-07T06:52:41+00:00","og_image":[{"width":300,"height":200,"url":"https:\/\/studysection.com\/blog\/wp-content\/uploads\/2022\/04\/Singleton-design.png","type":"image\/png"}],"author":"admin-studysection-blog","twitter_card":"summary_large_image","twitter_creator":"@studysection","twitter_site":"@studysection","twitter_misc":{"Written by":"admin-studysection-blog","Est. reading time":"2 minutes"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"Article","@id":"https:\/\/studysection.com\/blog\/singleton-design-pattern\/#article","isPartOf":{"@id":"https:\/\/studysection.com\/blog\/singleton-design-pattern\/"},"author":{"name":"admin-studysection-blog","@id":"https:\/\/studysection.com\/blog\/#\/schema\/person\/db367e2c29a12d1808fb1979edb3d402"},"headline":"Singleton Design Pattern","datePublished":"2022-04-07T04:22:11+00:00","dateModified":"2022-04-07T06:52:41+00:00","mainEntityOfPage":{"@id":"https:\/\/studysection.com\/blog\/singleton-design-pattern\/"},"wordCount":448,"commentCount":0,"publisher":{"@id":"https:\/\/studysection.com\/blog\/#organization"},"keywords":["C","Singleton"],"articleSection":["Learn and Grow"],"inLanguage":"en-US","potentialAction":[{"@type":"CommentAction","name":"Comment","target":["https:\/\/studysection.com\/blog\/singleton-design-pattern\/#respond"]}]},{"@type":"WebPage","@id":"https:\/\/studysection.com\/blog\/singleton-design-pattern\/","url":"https:\/\/studysection.com\/blog\/singleton-design-pattern\/","name":"Singleton design pattern - StudySection Blog","isPartOf":{"@id":"https:\/\/studysection.com\/blog\/#website"},"datePublished":"2022-04-07T04:22:11+00:00","dateModified":"2022-04-07T06:52:41+00:00","description":"Singleton design pattern in C# is one of the most widely used design patterns. In this pattern, only one instance of a class is created","breadcrumb":{"@id":"https:\/\/studysection.com\/blog\/singleton-design-pattern\/#breadcrumb"},"inLanguage":"en-US","potentialAction":[{"@type":"ReadAction","target":["https:\/\/studysection.com\/blog\/singleton-design-pattern\/"]}]},{"@type":"BreadcrumbList","@id":"https:\/\/studysection.com\/blog\/singleton-design-pattern\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/studysection.com\/blog\/"},{"@type":"ListItem","position":2,"name":"Singleton Design Pattern"}]},{"@type":"WebSite","@id":"https:\/\/studysection.com\/blog\/#website","url":"https:\/\/studysection.com\/blog\/","name":"Blog Posts on famous people, innovations and educational topics","description":"","publisher":{"@id":"https:\/\/studysection.com\/blog\/#organization"},"potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/studysection.com\/blog\/?s={search_term_string}"},"query-input":"required name=search_term_string"}],"inLanguage":"en-US"},{"@type":"Organization","@id":"https:\/\/studysection.com\/blog\/#organization","name":"StudySection","url":"https:\/\/studysection.com\/blog\/","logo":{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/studysection.com\/blog\/#\/schema\/logo\/image\/","url":"https:\/\/studysection.com\/blog\/wp-content\/uploads\/2021\/10\/studySection-logo.png","contentUrl":"https:\/\/studysection.com\/blog\/wp-content\/uploads\/2021\/10\/studySection-logo.png","width":920,"height":440,"caption":"StudySection"},"image":{"@id":"https:\/\/studysection.com\/blog\/#\/schema\/logo\/image\/"},"sameAs":["https:\/\/www.facebook.com\/studysection","https:\/\/twitter.com\/studysection","https:\/\/www.instagram.com\/study.section\/","https:\/\/www.linkedin.com\/company\/studysection"]},{"@type":"Person","@id":"https:\/\/studysection.com\/blog\/#\/schema\/person\/db367e2c29a12d1808fb1979edb3d402","name":"admin-studysection-blog","image":{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/studysection.com\/blog\/#\/schema\/person\/image\/","url":"https:\/\/secure.gravatar.com\/avatar\/054ac87a6874df1932004239cd8eab36?s=96&d=mm&r=g","contentUrl":"https:\/\/secure.gravatar.com\/avatar\/054ac87a6874df1932004239cd8eab36?s=96&d=mm&r=g","caption":"admin-studysection-blog"},"url":"https:\/\/studysection.com\/blog\/author\/admin-studysection-blog\/"}]}},"views":308,"_links":{"self":[{"href":"https:\/\/studysection.com\/blog\/wp-json\/wp\/v2\/posts\/5802"}],"collection":[{"href":"https:\/\/studysection.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/studysection.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/studysection.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/studysection.com\/blog\/wp-json\/wp\/v2\/comments?post=5802"}],"version-history":[{"count":3,"href":"https:\/\/studysection.com\/blog\/wp-json\/wp\/v2\/posts\/5802\/revisions"}],"predecessor-version":[{"id":5806,"href":"https:\/\/studysection.com\/blog\/wp-json\/wp\/v2\/posts\/5802\/revisions\/5806"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/studysection.com\/blog\/wp-json\/wp\/v2\/media\/5803"}],"wp:attachment":[{"href":"https:\/\/studysection.com\/blog\/wp-json\/wp\/v2\/media?parent=5802"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/studysection.com\/blog\/wp-json\/wp\/v2\/categories?post=5802"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/studysection.com\/blog\/wp-json\/wp\/v2\/tags?post=5802"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}