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BitConverter.GetBytes Method (Double)

Returns the specified double-precision floating point value as an array of bytes.

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

public static byte[] GetBytes(
	double value
)

Parameters

value
Type: System.Double

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 Double values to Byte arrays with the GetBytes method.

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

class GetBytesDoubleDemo
{
    const string formatter = "{0,25:E16}{1,30}";

    // Convert a double argument to a byte array and display it. 
    public static void GetBytesDouble( double 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( double ) " +
            "\nmethod generates the following output.\n" );
        Console.WriteLine( formatter, "double", "byte array" );
        Console.WriteLine( formatter, "------", "----------" );

        // Convert double values and display the results.
        GetBytesDouble( 0.0 );
        GetBytesDouble( 1.0 );
        GetBytesDouble( 255.0 );
        GetBytesDouble( 4294967295.0 );
        GetBytesDouble( 0.00390625 );
        GetBytesDouble( 0.00000000023283064365386962890625 );
        GetBytesDouble( 1.23456789012345E-300 );
        GetBytesDouble( 1.2345678901234565 );
        GetBytesDouble( 1.2345678901234567 );
        GetBytesDouble( 1.2345678901234569 );
        GetBytesDouble( 1.23456789012345678E+300 );
        GetBytesDouble( double.MinValue );
        GetBytesDouble( double.MaxValue );
        GetBytesDouble( double.Epsilon );
        GetBytesDouble( double.NaN );
        GetBytesDouble( double.NegativeInfinity );
        GetBytesDouble( double.PositiveInfinity );
    }
}

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

                   double                    byte array
                   ------                    ----------
  0.0000000000000000E+000       00-00-00-00-00-00-00-00
  1.0000000000000000E+000       00-00-00-00-00-00-F0-3F
  2.5500000000000000E+002       00-00-00-00-00-E0-6F-40
  4.2949672950000000E+009       00-00-E0-FF-FF-FF-EF-41
  3.9062500000000000E-003       00-00-00-00-00-00-70-3F
  2.3283064365386963E-010       00-00-00-00-00-00-F0-3D
  1.2345678901234500E-300       DF-88-1E-1C-FE-74-AA-01
  1.2345678901234565E+000       FA-59-8C-42-CA-C0-F3-3F
  1.2345678901234567E+000       FB-59-8C-42-CA-C0-F3-3F
  1.2345678901234569E+000       FC-59-8C-42-CA-C0-F3-3F
  1.2345678901234569E+300       52-D3-BB-BC-E8-7E-3D-7E
 -1.7976931348623157E+308       FF-FF-FF-FF-FF-FF-EF-FF
  1.7976931348623157E+308       FF-FF-FF-FF-FF-FF-EF-7F
  4.9406564584124654E-324       01-00-00-00-00-00-00-00
                      NaN       00-00-00-00-00-00-F8-FF
                -Infinity       00-00-00-00-00-00-F0-FF
                 Infinity       00-00-00-00-00-00-F0-7F
*/

.NET Framework

Supported in: 4.6, 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

Supported in: Windows Phone 8.1

Supported in: Windows Phone Silverlight 8.1

Supported in: 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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