{"id":4883,"date":"2024-03-14T02:04:04","date_gmt":"2024-03-14T02:04:04","guid":{"rendered":"https:\/\/www.silicloud.com\/blog\/how-to-query-data-using-linq-in-c\/"},"modified":"2025-07-31T14:48:19","modified_gmt":"2025-07-31T14:48:19","slug":"how-to-query-data-using-linq-in-c","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/blog\/how-to-query-data-using-linq-in-c\/","title":{"rendered":"C# LINQ Query Tutorial: Basics"},"content":{"rendered":"<p>Using LINQ (Language Integrated Query) to query data in C# is very simple. Here is a simple example:<\/p>\n<pre class=\"post-pre\"><code><span class=\"hljs-keyword\">using<\/span> System;\r\n<span class=\"hljs-keyword\">using<\/span> System.Collections.Generic;\r\n<span class=\"hljs-keyword\">using<\/span> System.Linq;\r\n\r\n<span class=\"hljs-keyword\">class<\/span> <span class=\"hljs-title\">Program<\/span>\r\n{\r\n    <span class=\"hljs-function\"><span class=\"hljs-keyword\">static<\/span> <span class=\"hljs-keyword\">void<\/span> <span class=\"hljs-title\">Main<\/span>()<\/span>\r\n    {\r\n        List&lt;<span class=\"hljs-built_in\">int<\/span>&gt; numbers = <span class=\"hljs-keyword\">new<\/span> List&lt;<span class=\"hljs-built_in\">int<\/span>&gt; { <span class=\"hljs-number\">1<\/span>, <span class=\"hljs-number\">2<\/span>, <span class=\"hljs-number\">3<\/span>, <span class=\"hljs-number\">4<\/span>, <span class=\"hljs-number\">5<\/span>, <span class=\"hljs-number\">6<\/span>, <span class=\"hljs-number\">7<\/span>, <span class=\"hljs-number\">8<\/span>, <span class=\"hljs-number\">9<\/span>, <span class=\"hljs-number\">10<\/span> };\r\n\r\n        <span class=\"hljs-comment\">\/\/ \u4f7f\u7528LINQ\u67e5\u8be2\u6570\u636e<\/span>\r\n        <span class=\"hljs-keyword\">var<\/span> evenNumbers = numbers.Where(n =&gt; n % <span class=\"hljs-number\">2<\/span> == <span class=\"hljs-number\">0<\/span>);\r\n\r\n        <span class=\"hljs-comment\">\/\/ \u8f93\u51fa\u67e5\u8be2\u7ed3\u679c<\/span>\r\n        <span class=\"hljs-keyword\">foreach<\/span> (<span class=\"hljs-keyword\">var<\/span> num <span class=\"hljs-keyword\">in<\/span> evenNumbers)\r\n        {\r\n            Console.WriteLine(num);\r\n        }\r\n    }\r\n}\r\n<\/code><\/pre>\n<p>In the example above, we first create a list of integers called numbers, and then use the Where method of LINQ to query the even numbers in the list. In the Where method, we use a lambda expression n => n % 2 == 0 to define the query condition, which means a number is even if the result of the modulo operation is 0. Finally, we output the even numbers to the console by iterating through the query results.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Using LINQ (Language Integrated Query) to query data in C# is very simple. Here is a simple example: using System; using System.Collections.Generic; using System.Linq; class Program { static void Main() { List&lt;int&gt; numbers = new List&lt;int&gt; { 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 }; \/\/ \u4f7f\u7528LINQ\u67e5\u8be2\u6570\u636e var evenNumbers = numbers.Where(n =&gt; [&hellip;]<\/p>\n","protected":false},"author":8,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_import_markdown_pro_load_document_selector":0,"_import_markdown_pro_submit_text_textarea":"","footnotes":""},"categories":[1],"tags":[4503,696,381,4880,4879],"class_list":["post-4883","post","type-post","status-publish","format-standard","hentry","category-uncategorized","tag-c-linq","tag-c-examples","tag-c-programming","tag-data-query","tag-linq-tutorial"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v21.5 (Yoast SEO v21.5) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>C# LINQ Query Tutorial: Basics - Blog - Silicon Cloud<\/title>\n<meta name=\"description\" content=\"Learn how to query data using LINQ in C#. Step-by-step tutorial with code examples for filtering collections.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.silicloud.com\/blog\/how-to-query-data-using-linq-in-c\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"C# LINQ Query Tutorial: Basics\" \/>\n<meta property=\"og:description\" content=\"Learn how to query data using LINQ in C#. Step-by-step tutorial with code examples for filtering collections.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.silicloud.com\/blog\/how-to-query-data-using-linq-in-c\/\" \/>\n<meta property=\"og:site_name\" content=\"Blog - Silicon Cloud\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/SiliCloudGlobal\/\" \/>\n<meta property=\"article:published_time\" content=\"2024-03-14T02:04:04+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2025-07-31T14:48:19+00:00\" \/>\n<meta name=\"author\" content=\"William Carter\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:creator\" content=\"@SiliCloudGlobal\" \/>\n<meta name=\"twitter:site\" content=\"@SiliCloudGlobal\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"William Carter\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"1 minute\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/www.silicloud.com\/blog\/how-to-query-data-using-linq-in-c\/#article\",\"isPartOf\":{\"@id\":\"https:\/\/www.silicloud.com\/blog\/how-to-query-data-using-linq-in-c\/\"},\"author\":{\"name\":\"William Carter\",\"@id\":\"https:\/\/www.silicloud.com\/blog\/#\/schema\/person\/f697031891aacefc4b681d139781d3c0\"},\"headline\":\"C# LINQ Query Tutorial: Basics\",\"datePublished\":\"2024-03-14T02:04:04+00:00\",\"dateModified\":\"2025-07-31T14:48:19+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/www.silicloud.com\/blog\/how-to-query-data-using-linq-in-c\/\"},\"wordCount\":97,\"publisher\":{\"@id\":\"https:\/\/www.silicloud.com\/blog\/#organization\"},\"keywords\":[\"C# LINQ\",\"C++ examples\",\"C++ Programming\",\"Data query\",\"LINQ tutorial\"],\"inLanguage\":\"en-US\"},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.silicloud.com\/blog\/how-to-query-data-using-linq-in-c\/\",\"url\":\"https:\/\/www.silicloud.com\/blog\/how-to-query-data-using-linq-in-c\/\",\"name\":\"C# LINQ Query Tutorial: Basics - Blog - Silicon Cloud\",\"isPartOf\":{\"@id\":\"https:\/\/www.silicloud.com\/blog\/#website\"},\"datePublished\":\"2024-03-14T02:04:04+00:00\",\"dateModified\":\"2025-07-31T14:48:19+00:00\",\"description\":\"Learn how to query data using LINQ in C#. Step-by-step tutorial with code examples for filtering collections.\",\"breadcrumb\":{\"@id\":\"https:\/\/www.silicloud.com\/blog\/how-to-query-data-using-linq-in-c\/#breadcrumb\"},\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/www.silicloud.com\/blog\/how-to-query-data-using-linq-in-c\/\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/www.silicloud.com\/blog\/how-to-query-data-using-linq-in-c\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\/\/www.silicloud.com\/blog\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"C# LINQ Query Tutorial: Basics\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\/\/www.silicloud.com\/blog\/#website\",\"url\":\"https:\/\/www.silicloud.com\/blog\/\",\"name\":\"Silicon Cloud Blog\",\"description\":\"\",\"publisher\":{\"@id\":\"https:\/\/www.silicloud.com\/blog\/#organization\"},\"inLanguage\":\"en-US\"},{\"@type\":\"Organization\",\"@id\":\"https:\/\/www.silicloud.com\/blog\/#organization\",\"name\":\"Silicon Cloud Blog\",\"url\":\"https:\/\/www.silicloud.com\/blog\/\",\"logo\":{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\/\/www.silicloud.com\/blog\/#\/schema\/logo\/image\/\",\"url\":\"https:\/\/www.silicloud.com\/blog\/wp-content\/uploads\/2023\/11\/EN-SILICON-Full.png\",\"contentUrl\":\"https:\/\/www.silicloud.com\/blog\/wp-content\/uploads\/2023\/11\/EN-SILICON-Full.png\",\"width\":1024,\"height\":1024,\"caption\":\"Silicon Cloud Blog\"},\"image\":{\"@id\":\"https:\/\/www.silicloud.com\/blog\/#\/schema\/logo\/image\/\"},\"sameAs\":[\"https:\/\/www.facebook.com\/SiliCloudGlobal\/\",\"https:\/\/twitter.com\/SiliCloudGlobal\"]},{\"@type\":\"Person\",\"@id\":\"https:\/\/www.silicloud.com\/blog\/#\/schema\/person\/f697031891aacefc4b681d139781d3c0\",\"name\":\"William Carter\",\"image\":{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\/\/www.silicloud.com\/blog\/#\/schema\/person\/image\/\",\"url\":\"https:\/\/secure.gravatar.com\/avatar\/1786698071dd8d74bec894b512f9e3c610c3a2a32985f67e688976cee3c8bbef?s=96&d=mm&r=g\",\"contentUrl\":\"https:\/\/secure.gravatar.com\/avatar\/1786698071dd8d74bec894b512f9e3c610c3a2a32985f67e688976cee3c8bbef?s=96&d=mm&r=g\",\"caption\":\"William Carter\"},\"url\":\"https:\/\/www.silicloud.com\/blog\/author\/williamcarter\/\"}]}<\/script>\n<!-- \/ Yoast SEO Premium plugin. -->","yoast_head_json":{"title":"C# LINQ Query Tutorial: Basics - Blog - Silicon Cloud","description":"Learn how to query data using LINQ in C#. Step-by-step tutorial with code examples for filtering collections.","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:\/\/www.silicloud.com\/blog\/how-to-query-data-using-linq-in-c\/","og_locale":"en_US","og_type":"article","og_title":"C# LINQ Query Tutorial: Basics","og_description":"Learn how to query data using LINQ in C#. Step-by-step tutorial with code examples for filtering collections.","og_url":"https:\/\/www.silicloud.com\/blog\/how-to-query-data-using-linq-in-c\/","og_site_name":"Blog - Silicon Cloud","article_publisher":"https:\/\/www.facebook.com\/SiliCloudGlobal\/","article_published_time":"2024-03-14T02:04:04+00:00","article_modified_time":"2025-07-31T14:48:19+00:00","author":"William Carter","twitter_card":"summary_large_image","twitter_creator":"@SiliCloudGlobal","twitter_site":"@SiliCloudGlobal","twitter_misc":{"Written by":"William Carter","Est. reading time":"1 minute"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"Article","@id":"https:\/\/www.silicloud.com\/blog\/how-to-query-data-using-linq-in-c\/#article","isPartOf":{"@id":"https:\/\/www.silicloud.com\/blog\/how-to-query-data-using-linq-in-c\/"},"author":{"name":"William Carter","@id":"https:\/\/www.silicloud.com\/blog\/#\/schema\/person\/f697031891aacefc4b681d139781d3c0"},"headline":"C# LINQ Query Tutorial: Basics","datePublished":"2024-03-14T02:04:04+00:00","dateModified":"2025-07-31T14:48:19+00:00","mainEntityOfPage":{"@id":"https:\/\/www.silicloud.com\/blog\/how-to-query-data-using-linq-in-c\/"},"wordCount":97,"publisher":{"@id":"https:\/\/www.silicloud.com\/blog\/#organization"},"keywords":["C# LINQ","C++ examples","C++ Programming","Data query","LINQ tutorial"],"inLanguage":"en-US"},{"@type":"WebPage","@id":"https:\/\/www.silicloud.com\/blog\/how-to-query-data-using-linq-in-c\/","url":"https:\/\/www.silicloud.com\/blog\/how-to-query-data-using-linq-in-c\/","name":"C# LINQ Query Tutorial: Basics - Blog - Silicon Cloud","isPartOf":{"@id":"https:\/\/www.silicloud.com\/blog\/#website"},"datePublished":"2024-03-14T02:04:04+00:00","dateModified":"2025-07-31T14:48:19+00:00","description":"Learn how to query data using LINQ in C#. Step-by-step tutorial with code examples for filtering collections.","breadcrumb":{"@id":"https:\/\/www.silicloud.com\/blog\/how-to-query-data-using-linq-in-c\/#breadcrumb"},"inLanguage":"en-US","potentialAction":[{"@type":"ReadAction","target":["https:\/\/www.silicloud.com\/blog\/how-to-query-data-using-linq-in-c\/"]}]},{"@type":"BreadcrumbList","@id":"https:\/\/www.silicloud.com\/blog\/how-to-query-data-using-linq-in-c\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/www.silicloud.com\/blog\/"},{"@type":"ListItem","position":2,"name":"C# LINQ Query Tutorial: Basics"}]},{"@type":"WebSite","@id":"https:\/\/www.silicloud.com\/blog\/#website","url":"https:\/\/www.silicloud.com\/blog\/","name":"Silicon Cloud Blog","description":"","publisher":{"@id":"https:\/\/www.silicloud.com\/blog\/#organization"},"inLanguage":"en-US"},{"@type":"Organization","@id":"https:\/\/www.silicloud.com\/blog\/#organization","name":"Silicon Cloud Blog","url":"https:\/\/www.silicloud.com\/blog\/","logo":{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/www.silicloud.com\/blog\/#\/schema\/logo\/image\/","url":"https:\/\/www.silicloud.com\/blog\/wp-content\/uploads\/2023\/11\/EN-SILICON-Full.png","contentUrl":"https:\/\/www.silicloud.com\/blog\/wp-content\/uploads\/2023\/11\/EN-SILICON-Full.png","width":1024,"height":1024,"caption":"Silicon Cloud Blog"},"image":{"@id":"https:\/\/www.silicloud.com\/blog\/#\/schema\/logo\/image\/"},"sameAs":["https:\/\/www.facebook.com\/SiliCloudGlobal\/","https:\/\/twitter.com\/SiliCloudGlobal"]},{"@type":"Person","@id":"https:\/\/www.silicloud.com\/blog\/#\/schema\/person\/f697031891aacefc4b681d139781d3c0","name":"William Carter","image":{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/www.silicloud.com\/blog\/#\/schema\/person\/image\/","url":"https:\/\/secure.gravatar.com\/avatar\/1786698071dd8d74bec894b512f9e3c610c3a2a32985f67e688976cee3c8bbef?s=96&d=mm&r=g","contentUrl":"https:\/\/secure.gravatar.com\/avatar\/1786698071dd8d74bec894b512f9e3c610c3a2a32985f67e688976cee3c8bbef?s=96&d=mm&r=g","caption":"William Carter"},"url":"https:\/\/www.silicloud.com\/blog\/author\/williamcarter\/"}]}},"_links":{"self":[{"href":"https:\/\/www.silicloud.com\/blog\/wp-json\/wp\/v2\/posts\/4883","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.silicloud.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.silicloud.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.silicloud.com\/blog\/wp-json\/wp\/v2\/users\/8"}],"replies":[{"embeddable":true,"href":"https:\/\/www.silicloud.com\/blog\/wp-json\/wp\/v2\/comments?post=4883"}],"version-history":[{"count":2,"href":"https:\/\/www.silicloud.com\/blog\/wp-json\/wp\/v2\/posts\/4883\/revisions"}],"predecessor-version":[{"id":149596,"href":"https:\/\/www.silicloud.com\/blog\/wp-json\/wp\/v2\/posts\/4883\/revisions\/149596"}],"wp:attachment":[{"href":"https:\/\/www.silicloud.com\/blog\/wp-json\/wp\/v2\/media?parent=4883"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.silicloud.com\/blog\/wp-json\/wp\/v2\/categories?post=4883"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.silicloud.com\/blog\/wp-json\/wp\/v2\/tags?post=4883"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}