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BitConverter.GetBytes Method (Int64)

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

Namespace:  System
Assemblies:   System.Runtime.Extensions (in System.Runtime.Extensions.dll)
  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: 4.6, 4.5, 4, 3.5, 3.0, 2.0, 1.1

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

XNA Framework

Supported in: 3.0, 2.0, 1.0

Portable Class Library

Supported in: Portable Class Library

Supported in: Windows Phone 8.1

Supported in: Windows Phone Silverlight 8.1

Supported in: Windows Phone Silverlight 8
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