This documentation is archived and is not being maintained.

Encoding.Convert Method (Encoding, Encoding, Byte[])

Converts an entire byte array from one encoding to another.

Namespace:  System.Text
Assembly:  mscorlib (in mscorlib.dll)

public static byte[] Convert(
	Encoding srcEncoding,
	Encoding dstEncoding,
	byte[] bytes


Type: System.Text.Encoding
The encoding format of bytes.
Type: System.Text.Encoding
The target encoding format.
Type: System.Byte[]
The bytes to convert.

Return Value

Type: System.Byte[]
An array of type Byte containing the results of converting bytes from srcEncoding to dstEncoding.


srcEncoding is null.


dstEncoding is null.


bytes is null.


A fallback occurred (see Character Encoding in the .NET Framework for complete explanation)


srcEncoding.DecoderFallback is set to DecoderExceptionFallback.


A fallback occurred (see Character Encoding in the .NET Framework for complete explanation)


dstEncoding.EncoderFallback is set to EncoderExceptionFallback.

The following example converts a Unicode-encoded string to an ASCII-encoded string. Because the ASCII encoding object returned by the ASCII property uses replacement fallback and the Pi character is not part of the ASCII character set, the Pi character is replaced with a question mark, as the output from the example shows.

using System;
using System.Text;

class Example
   static void Main()
      string unicodeString = "This string contains the unicode character Pi (\u03a0)";

      // Create two different encodings.
      Encoding ascii = Encoding.ASCII;
      Encoding unicode = Encoding.Unicode;

      // Convert the string into a byte array.
      byte[] unicodeBytes = unicode.GetBytes(unicodeString);

      // Perform the conversion from one encoding to the other.
      byte[] asciiBytes = Encoding.Convert(unicode, ascii, unicodeBytes);

      // Convert the new byte[] into a char[] and then into a string.
      char[] asciiChars = new char[ascii.GetCharCount(asciiBytes, 0, asciiBytes.Length)];
      ascii.GetChars(asciiBytes, 0, asciiBytes.Length, asciiChars, 0);
      string asciiString = new string(asciiChars);

      // Display the strings created before and after the conversion.
      Console.WriteLine("Original string: {0}", unicodeString);
      Console.WriteLine("Ascii converted string: {0}", asciiString);
// The example displays the following output:
//    Original string: This string contains the unicode character Pi (Π)
//    Ascii converted string: This string contains the unicode character Pi (?)

.NET Framework

Supported in: 4, 3.5, 3.0, 2.0, 1.1, 1.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Portable Class Library

Supported in: Portable Class Library

Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows XP SP2 x64 Edition, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.