FileInfo - ReadAllBytes
Opens a binary file, reads the contents of the file into a byte array, and then closes the file.
public static string FileName = "test.txt"; public static void Main() { SaveFile(); // C# Extension Method: FileInfo - ReadAllBytes var bytes = FileName.ToFileInfo().ReadAllBytes(); Console.WriteLine(System.Text.Encoding.Default.GetString(bytes)); } 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> /// Opens a binary file, reads the contents of the file into a byte array, and then closes the file. /// </summary> /// <param name="this">The file to open for reading.</param> /// <returns>A byte array containing the contents of the file.</returns> /// ### /// <exception cref="T:System.ArgumentException"> /// <paramref name="this" /> is a zero-length string, contains only /// white space, or contains one or more invalid characters as defined by /// <see /// cref="F:System.IO.Path.InvalidPathChars" /> /// . /// </exception> /// ### /// <exception cref="T:System.ArgumentNullException"> /// <paramref name="this" /> is null. /// </exception> /// ### /// <exception cref="T:System.IO.PathTooLongException"> /// The specified @this, file name, or both exceed the system- /// defined maximum length. For example, on Windows-based platforms, paths must be less than 248 characters, and file /// names must be less than 260 characters. /// </exception> /// ### /// <exception cref="T:System.IO.DirectoryNotFoundException"> /// The specified @this is invalid (for example, it is on /// an unmapped drive). /// </exception> /// ### /// <exception cref="T:System.IO.IOException">An I/O error occurred while opening the file.</exception> /// ### /// <exception cref="T:System.UnauthorizedAccessException"> /// This operation is not supported on the current /// platform.-or- <paramref name="this" /> specified a directory.-or- The caller does not have the required /// permission. /// </exception> /// ### /// <exception cref="T:System.IO.FileNotFoundException"> /// The file specified in <paramref name="this" /> was not /// found. /// </exception> /// ### /// <exception cref="T:System.NotSupportedException"> /// <paramref name="this" /> is in an invalid format. /// </exception> /// ### /// <exception cref="T:System.Security.SecurityException">The caller does not have the required permission.</exception> public static Byte[] ReadAllBytes(this FileInfo @this) { return File.ReadAllBytes(@this.FullName); } }