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BitConverter.GetBytes Method (Int64)

Returns the specified 64-bit signed integer value as an array of bytes.

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

public static byte[] GetBytes(
	long value
)

Parameters

value
Type: System.Int64

The number to convert.

Return Value

Type: System.Byte[]
An array of bytes with length 8.

The order of bytes in the array returned by the GetBytes method depends on whether the computer architecture is little-endian or big-endian.

The following code example converts the bit patterns of Int64 values to Byte arrays with the GetBytes method.

// Example of the BitConverter.GetBytes( long ) method. 
using System;

class GetBytesInt64Demo
{
    const string formatter = "{0,22}{1,30}";

    // Convert a long argument to a byte array and display it. 
    public static void GetBytesInt64( long argument )
    {
        byte[] byteArray = BitConverter.GetBytes( argument );
        Console.WriteLine( formatter, argument, 
            BitConverter.ToString( byteArray ) );
    }

    public static void Main( )
    {
        Console.WriteLine( 
            "This example of the BitConverter.GetBytes( long ) " +
            "\nmethod generates the following output.\n" );
        Console.WriteLine( formatter, "long", "byte array" );
        Console.WriteLine( formatter, "----", "----------" );

        // Convert long values and display the results.
        GetBytesInt64( 0 );
        GetBytesInt64( 0xFFFFFF );
        GetBytesInt64( -0xFFFFFF );
        GetBytesInt64( 1000000000 );
        GetBytesInt64( -1000000000 );
        GetBytesInt64( 0x100000000 );
        GetBytesInt64( -0x100000000 );
        GetBytesInt64( 0xAAAAAAAAAAAA );
        GetBytesInt64( -0xAAAAAAAAAAAA );
        GetBytesInt64( 1000000000000000000 );
        GetBytesInt64( -1000000000000000000 );
        GetBytesInt64( long.MinValue );
        GetBytesInt64( long.MaxValue );
    }
}

/*
This example of the BitConverter.GetBytes( long )
method generates the following output.

                  long                    byte array
                  ----                    ----------
                     0       00-00-00-00-00-00-00-00
              16777215       FF-FF-FF-00-00-00-00-00
             -16777215       01-00-00-FF-FF-FF-FF-FF
            1000000000       00-CA-9A-3B-00-00-00-00
           -1000000000       00-36-65-C4-FF-FF-FF-FF
            4294967296       00-00-00-00-01-00-00-00
           -4294967296       00-00-00-00-FF-FF-FF-FF
       187649984473770       AA-AA-AA-AA-AA-AA-00-00
      -187649984473770       56-55-55-55-55-55-FF-FF
   1000000000000000000       00-00-64-A7-B3-B6-E0-0D
  -1000000000000000000       00-00-9C-58-4C-49-1F-F2
  -9223372036854775808       00-00-00-00-00-00-00-80
   9223372036854775807       FF-FF-FF-FF-FF-FF-FF-7F
*/

.NET Framework

Supported in: 4.5, 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

.NET for Windows Store apps

Supported in: Windows 8

.NET for Windows Phone apps

Supported in: Windows Phone 8.1, Windows Phone Silverlight 8.1, Windows Phone Silverlight 8

Windows Phone 8.1, Windows Phone 8, Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

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

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