[C#]取得MIME Content Type對應的檔案副檔名

續[C#]取得檔案對應的MIME Content Type這篇，這次反過來若是想知道MIME Content Type對應到的副檔名有哪些的話，一樣我們可以從登錄檔中取得，像是下面這樣： private static IEnumerable GetMIMESupportedExt(string mime) {     var linq = from item in Microsoft.Win32.Registry.ClassesRoot.GetSubKeyNames()                let key = Microsoft.Win32.Registry.ClassesRoot.OpenSubKey(item)                let value = key.GetValue(“Content Type”)                where value != null && value.ToString().Equals(mime, StringComparison.CurrentCultureIgnoreCase)                select item;     return linq; }   

完整的範例如下：

using System; using System.Collections.Generic; using System.Linq; using System.Text; namespace ConsoleApplication11 {     class Program     {         static void Main(string[] args)         {             foreach (var item in GetMIMESupportedExt(“video/x-ms-asf”))             {                 Console.WriteLine(item); ;             }         }         private static IEnumerable GetMIMESupportedExt(string mime)         {             var linq = from item in Microsoft.Win32.Registry.ClassesRoot.GetSubKeyNames()                        let key = Microsoft.Win32.Registry.ClassesRoot.OpenSubKey(item)                        let value = key.GetValue(“Content Type”)                        where value != null && value.ToString().Equals(mime, StringComparison.CurrentCultureIgnoreCase)                        select item;             return linq;         }      } }

運行結果：