{"id":3274,"date":"2024-03-13T06:41:59","date_gmt":"2024-03-13T06:41:59","guid":{"rendered":"https:\/\/www.silicloud.com\/blog\/what-is-the-method-for-reading-and-writing-ini-files-in-c\/"},"modified":"2025-07-30T13:53:10","modified_gmt":"2025-07-30T13:53:10","slug":"what-is-the-method-for-reading-and-writing-ini-files-in-c","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/blog\/what-is-the-method-for-reading-and-writing-ini-files-in-c\/","title":{"rendered":"C# INI Files: Read &#038; Write Methods"},"content":{"rendered":"<p>In C#, the StreamReader and StreamWriter classes under the System.IO namespace can be used to read and write INI files. Here is a simple example code:<\/p>\n<pre class=\"post-pre\"><code><span class=\"hljs-keyword\">using<\/span> System;\r\n<span class=\"hljs-keyword\">using<\/span> System.IO;\r\n\r\n<span class=\"hljs-keyword\">public<\/span> <span class=\"hljs-keyword\">class<\/span> <span class=\"hljs-title\">IniFile<\/span>\r\n{\r\n    <span class=\"hljs-keyword\">private<\/span> <span class=\"hljs-built_in\">string<\/span> filePath;\r\n\r\n    <span class=\"hljs-function\"><span class=\"hljs-keyword\">public<\/span> <span class=\"hljs-title\">IniFile<\/span>(<span class=\"hljs-params\"><span class=\"hljs-built_in\">string<\/span> filePath<\/span>)<\/span>\r\n    {\r\n        <span class=\"hljs-keyword\">this<\/span>.filePath = filePath;\r\n    }\r\n\r\n    <span class=\"hljs-function\"><span class=\"hljs-keyword\">public<\/span> <span class=\"hljs-built_in\">string<\/span> <span class=\"hljs-title\">ReadValue<\/span>(<span class=\"hljs-params\"><span class=\"hljs-built_in\">string<\/span> section, <span class=\"hljs-built_in\">string<\/span> key<\/span>)<\/span>\r\n    {\r\n        <span class=\"hljs-built_in\">string<\/span> <span class=\"hljs-keyword\">value<\/span> = <span class=\"hljs-string\">\"\"<\/span>;\r\n        <span class=\"hljs-keyword\">using<\/span> (StreamReader sr = <span class=\"hljs-keyword\">new<\/span> StreamReader(filePath))\r\n        {\r\n            <span class=\"hljs-built_in\">string<\/span> line;\r\n            <span class=\"hljs-keyword\">while<\/span> ((line = sr.ReadLine()) != <span class=\"hljs-literal\">null<\/span>)\r\n            {\r\n                <span class=\"hljs-keyword\">if<\/span> (line.StartsWith(<span class=\"hljs-string\">$\"[<span class=\"hljs-subst\">{section}<\/span>]\"<\/span>))\r\n                {\r\n                    <span class=\"hljs-keyword\">while<\/span> ((line = sr.ReadLine()) != <span class=\"hljs-literal\">null<\/span>)\r\n                    {\r\n                        <span class=\"hljs-keyword\">if<\/span> (line.StartsWith(key))\r\n                        {\r\n                            <span class=\"hljs-keyword\">value<\/span> = line.Split(<span class=\"hljs-string\">'='<\/span>)[<span class=\"hljs-number\">1<\/span>].Trim();\r\n                            <span class=\"hljs-keyword\">break<\/span>;\r\n                        }\r\n                    }\r\n                    <span class=\"hljs-keyword\">break<\/span>;\r\n                }\r\n            }\r\n        }\r\n        <span class=\"hljs-keyword\">return<\/span> <span class=\"hljs-keyword\">value<\/span>;\r\n    }\r\n\r\n    <span class=\"hljs-function\"><span class=\"hljs-keyword\">public<\/span> <span class=\"hljs-keyword\">void<\/span> <span class=\"hljs-title\">WriteValue<\/span>(<span class=\"hljs-params\"><span class=\"hljs-built_in\">string<\/span> section, <span class=\"hljs-built_in\">string<\/span> key, <span class=\"hljs-built_in\">string<\/span> <span class=\"hljs-keyword\">value<\/span><\/span>)<\/span>\r\n    {\r\n        <span class=\"hljs-built_in\">bool<\/span> sectionExists = <span class=\"hljs-literal\">false<\/span>;\r\n        <span class=\"hljs-built_in\">string<\/span> tempFile = Path.GetTempFileName();\r\n        <span class=\"hljs-keyword\">using<\/span> (StreamReader sr = <span class=\"hljs-keyword\">new<\/span> StreamReader(filePath))\r\n        <span class=\"hljs-keyword\">using<\/span> (StreamWriter sw = <span class=\"hljs-keyword\">new<\/span> StreamWriter(tempFile))\r\n        {\r\n            <span class=\"hljs-built_in\">string<\/span> line;\r\n            <span class=\"hljs-keyword\">while<\/span> ((line = sr.ReadLine()) != <span class=\"hljs-literal\">null<\/span>)\r\n            {\r\n                <span class=\"hljs-keyword\">if<\/span> (line.StartsWith(<span class=\"hljs-string\">$\"[<span class=\"hljs-subst\">{section}<\/span>]\"<\/span>))\r\n                {\r\n                    sectionExists = <span class=\"hljs-literal\">true<\/span>;\r\n                }\r\n                sw.WriteLine(line);\r\n            }\r\n\r\n            <span class=\"hljs-keyword\">if<\/span> (!sectionExists)\r\n            {\r\n                sw.WriteLine(<span class=\"hljs-string\">$\"[<span class=\"hljs-subst\">{section}<\/span>]\"<\/span>);\r\n            }\r\n\r\n            sw.WriteLine(<span class=\"hljs-string\">$\"<span class=\"hljs-subst\">{key}<\/span>=<span class=\"hljs-subst\">{<span class=\"hljs-keyword\">value<\/span>}<\/span>\"<\/span>);\r\n        }\r\n\r\n        File.Delete(filePath);\r\n        File.Move(tempFile, filePath);\r\n    }\r\n}\r\n\r\n<span class=\"hljs-comment\">\/\/ \u4f7f\u7528\u793a\u4f8b<\/span>\r\nIniFile ini = <span class=\"hljs-keyword\">new<\/span> IniFile(<span class=\"hljs-string\">\"example.ini\"<\/span>);\r\nini.WriteValue(<span class=\"hljs-string\">\"Section1\"<\/span>, <span class=\"hljs-string\">\"Key1\"<\/span>, <span class=\"hljs-string\">\"Value1\"<\/span>);\r\n<span class=\"hljs-built_in\">string<\/span> <span class=\"hljs-keyword\">value<\/span> = ini.ReadValue(<span class=\"hljs-string\">\"Section1\"<\/span>, <span class=\"hljs-string\">\"Key1\"<\/span>);\r\nConsole.WriteLine(<span class=\"hljs-keyword\">value<\/span>);\r\n<\/code><\/pre>\n<p>In the example above, the IniFile class encapsulates methods for reading and writing INI files. The ReadValue method is used to read the value corresponding to a specified section and key, while the WriteValue method is used to write a value corresponding to a specified section and key.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>In C#, the StreamReader and StreamWriter classes under the System.IO namespace can be used to read and write INI files. Here is a simple example code: using System; using System.IO; public class IniFile { private string filePath; public IniFile(string filePath) { this.filePath = filePath; } public string ReadValue(string section, string key) { string value = [&hellip;]<\/p>\n","protected":false},"author":13,"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":[274,890,1134,1176,1177],"class_list":["post-3274","post","type-post","status-publish","format-standard","hentry","category-uncategorized","tag-c","tag-file-handling","tag-ini-files","tag-streamreader","tag-streamwriter"],"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# INI Files: Read &amp; Write Methods - Blog - Silicon Cloud<\/title>\n<meta name=\"description\" content=\"Learn how to read and write INI files in C# using StreamReader and StreamWriter. Complete guide with code examples.\" \/>\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\/what-is-the-method-for-reading-and-writing-ini-files-in-c\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"C# INI Files: Read &amp; Write Methods\" \/>\n<meta property=\"og:description\" content=\"Learn how to read and write INI files in C# using StreamReader and StreamWriter. Complete guide with code examples.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.silicloud.com\/blog\/what-is-the-method-for-reading-and-writing-ini-files-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=\"2024-03-13T06:41:59+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2025-07-30T13:53:10+00:00\" \/>\n<meta name=\"author\" content=\"Isabella Edwards\" \/>\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=\"Isabella Edwards\" \/>\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\/what-is-the-method-for-reading-and-writing-ini-files-in-c\/#article\",\"isPartOf\":{\"@id\":\"https:\/\/www.silicloud.com\/blog\/what-is-the-method-for-reading-and-writing-ini-files-in-c\/\"},\"author\":{\"name\":\"Isabella Edwards\",\"@id\":\"https:\/\/www.silicloud.com\/blog\/#\/schema\/person\/5579144e23c225c8188167f3e3f888dd\"},\"headline\":\"C# INI Files: Read &#038; Write Methods\",\"datePublished\":\"2024-03-13T06:41:59+00:00\",\"dateModified\":\"2025-07-30T13:53:10+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/www.silicloud.com\/blog\/what-is-the-method-for-reading-and-writing-ini-files-in-c\/\"},\"wordCount\":81,\"publisher\":{\"@id\":\"https:\/\/www.silicloud.com\/blog\/#organization\"},\"keywords\":[\"c#\",\"file handling\",\"INI files\",\"StreamReader\",\"StreamWriter\"],\"inLanguage\":\"en-US\"},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.silicloud.com\/blog\/what-is-the-method-for-reading-and-writing-ini-files-in-c\/\",\"url\":\"https:\/\/www.silicloud.com\/blog\/what-is-the-method-for-reading-and-writing-ini-files-in-c\/\",\"name\":\"C# INI Files: Read & Write Methods - Blog - Silicon Cloud\",\"isPartOf\":{\"@id\":\"https:\/\/www.silicloud.com\/blog\/#website\"},\"datePublished\":\"2024-03-13T06:41:59+00:00\",\"dateModified\":\"2025-07-30T13:53:10+00:00\",\"description\":\"Learn how to read and write INI files in C# using StreamReader and StreamWriter. Complete guide with code examples.\",\"breadcrumb\":{\"@id\":\"https:\/\/www.silicloud.com\/blog\/what-is-the-method-for-reading-and-writing-ini-files-in-c\/#breadcrumb\"},\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/www.silicloud.com\/blog\/what-is-the-method-for-reading-and-writing-ini-files-in-c\/\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/www.silicloud.com\/blog\/what-is-the-method-for-reading-and-writing-ini-files-in-c\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\/\/www.silicloud.com\/blog\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"C# INI Files: Read &#038; Write Methods\"}]},{\"@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\/5579144e23c225c8188167f3e3f888dd\",\"name\":\"Isabella Edwards\",\"image\":{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\/\/www.silicloud.com\/blog\/#\/schema\/person\/image\/\",\"url\":\"https:\/\/secure.gravatar.com\/avatar\/d4d4dec47f553ac7961d9fa4cc9bdcdcf5b7ce5106594330b6d25c5694fdbaec?s=96&d=mm&r=g\",\"contentUrl\":\"https:\/\/secure.gravatar.com\/avatar\/d4d4dec47f553ac7961d9fa4cc9bdcdcf5b7ce5106594330b6d25c5694fdbaec?s=96&d=mm&r=g\",\"caption\":\"Isabella Edwards\"},\"url\":\"https:\/\/www.silicloud.com\/blog\/author\/isabellaedwards\/\"}]}<\/script>\n<!-- \/ Yoast SEO Premium plugin. -->","yoast_head_json":{"title":"C# INI Files: Read & Write Methods - Blog - Silicon Cloud","description":"Learn how to read and write INI files in C# using StreamReader and StreamWriter. Complete guide with code examples.","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\/what-is-the-method-for-reading-and-writing-ini-files-in-c\/","og_locale":"en_US","og_type":"article","og_title":"C# INI Files: Read & Write Methods","og_description":"Learn how to read and write INI files in C# using StreamReader and StreamWriter. Complete guide with code examples.","og_url":"https:\/\/www.silicloud.com\/blog\/what-is-the-method-for-reading-and-writing-ini-files-in-c\/","og_site_name":"Blog - Silicon Cloud","article_publisher":"https:\/\/www.facebook.com\/SiliCloudGlobal\/","article_published_time":"2024-03-13T06:41:59+00:00","article_modified_time":"2025-07-30T13:53:10+00:00","author":"Isabella Edwards","twitter_card":"summary_large_image","twitter_creator":"@SiliCloudGlobal","twitter_site":"@SiliCloudGlobal","twitter_misc":{"Written by":"Isabella Edwards","Est. reading time":"1 minute"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"Article","@id":"https:\/\/www.silicloud.com\/blog\/what-is-the-method-for-reading-and-writing-ini-files-in-c\/#article","isPartOf":{"@id":"https:\/\/www.silicloud.com\/blog\/what-is-the-method-for-reading-and-writing-ini-files-in-c\/"},"author":{"name":"Isabella Edwards","@id":"https:\/\/www.silicloud.com\/blog\/#\/schema\/person\/5579144e23c225c8188167f3e3f888dd"},"headline":"C# INI Files: Read &#038; Write Methods","datePublished":"2024-03-13T06:41:59+00:00","dateModified":"2025-07-30T13:53:10+00:00","mainEntityOfPage":{"@id":"https:\/\/www.silicloud.com\/blog\/what-is-the-method-for-reading-and-writing-ini-files-in-c\/"},"wordCount":81,"publisher":{"@id":"https:\/\/www.silicloud.com\/blog\/#organization"},"keywords":["c#","file handling","INI files","StreamReader","StreamWriter"],"inLanguage":"en-US"},{"@type":"WebPage","@id":"https:\/\/www.silicloud.com\/blog\/what-is-the-method-for-reading-and-writing-ini-files-in-c\/","url":"https:\/\/www.silicloud.com\/blog\/what-is-the-method-for-reading-and-writing-ini-files-in-c\/","name":"C# INI Files: Read & Write Methods - Blog - Silicon Cloud","isPartOf":{"@id":"https:\/\/www.silicloud.com\/blog\/#website"},"datePublished":"2024-03-13T06:41:59+00:00","dateModified":"2025-07-30T13:53:10+00:00","description":"Learn how to read and write INI files in C# using StreamReader and StreamWriter. Complete guide with code examples.","breadcrumb":{"@id":"https:\/\/www.silicloud.com\/blog\/what-is-the-method-for-reading-and-writing-ini-files-in-c\/#breadcrumb"},"inLanguage":"en-US","potentialAction":[{"@type":"ReadAction","target":["https:\/\/www.silicloud.com\/blog\/what-is-the-method-for-reading-and-writing-ini-files-in-c\/"]}]},{"@type":"BreadcrumbList","@id":"https:\/\/www.silicloud.com\/blog\/what-is-the-method-for-reading-and-writing-ini-files-in-c\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/www.silicloud.com\/blog\/"},{"@type":"ListItem","position":2,"name":"C# INI Files: Read &#038; Write Methods"}]},{"@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\/5579144e23c225c8188167f3e3f888dd","name":"Isabella Edwards","image":{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/www.silicloud.com\/blog\/#\/schema\/person\/image\/","url":"https:\/\/secure.gravatar.com\/avatar\/d4d4dec47f553ac7961d9fa4cc9bdcdcf5b7ce5106594330b6d25c5694fdbaec?s=96&d=mm&r=g","contentUrl":"https:\/\/secure.gravatar.com\/avatar\/d4d4dec47f553ac7961d9fa4cc9bdcdcf5b7ce5106594330b6d25c5694fdbaec?s=96&d=mm&r=g","caption":"Isabella Edwards"},"url":"https:\/\/www.silicloud.com\/blog\/author\/isabellaedwards\/"}]}},"_links":{"self":[{"href":"https:\/\/www.silicloud.com\/blog\/wp-json\/wp\/v2\/posts\/3274","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\/13"}],"replies":[{"embeddable":true,"href":"https:\/\/www.silicloud.com\/blog\/wp-json\/wp\/v2\/comments?post=3274"}],"version-history":[{"count":2,"href":"https:\/\/www.silicloud.com\/blog\/wp-json\/wp\/v2\/posts\/3274\/revisions"}],"predecessor-version":[{"id":147906,"href":"https:\/\/www.silicloud.com\/blog\/wp-json\/wp\/v2\/posts\/3274\/revisions\/147906"}],"wp:attachment":[{"href":"https:\/\/www.silicloud.com\/blog\/wp-json\/wp\/v2\/media?parent=3274"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.silicloud.com\/blog\/wp-json\/wp\/v2\/categories?post=3274"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.silicloud.com\/blog\/wp-json\/wp\/v2\/tags?post=3274"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}