FileInfo - RenameExtension
Changes the extension of a specified file.
public static string FileName = "test.txt"; public static void Main() { SaveFile(); var file = FileName.ToFileInfo(); Console.WriteLine("File Name: {0}", file.FullName); // C# Extension Method: FileInfo - RenameExtension file.RenameExtension("md"); Console.WriteLine("New file Name: {0}", file.FullName); } private static void SaveFile() { var html = @"<!DOCTYPE html> <html> <body> <h1>This is <b>bold</b> heading</h1> <p>This is <u>underlined</u> paragraph</p> <h2>This is <i>italic</i> heading</h2> </body> </html> "; html.SaveAs(FileName); }
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using System; using System.IO; public static partial class Extensions { /// <summary> /// Changes the extension of a @this string. /// </summary> /// <param name="this"> /// The @this information to modify. The @this cannot contain any of the characters defined in /// <see /// cref="M:System.IO.Path.GetInvalidPathChars" /> /// . /// </param> /// <param name="extension"> /// The new extension (with or without a leading period). Specify null to remove an existing /// extension from /// <paramref /// name="this" /> /// . /// </param> /// ### /// <exception cref="T:System.ArgumentException"> /// <paramref name="this" /> contains one or more of the invalid /// characters defined in /// <see /// cref="M:System.IO.Path.GetInvalidPathChars" /> /// . /// </exception> public static void RenameExtension(this FileInfo @this, String extension) { string filePath = Path.ChangeExtension(@this.FullName, extension); @this.MoveTo(filePath); } }