C# BitConverter ToUInt64

Description

BitConverter ToUInt64 returns a 64-bit unsigned integer converted from eight bytes at a specified position in a byte array.

Syntax

BitConverter.ToUInt64 has the following syntax.

[CLSCompliantAttribute(false)]/*from   w w w  .java 2 s.  c  om*/
public static ulong ToUInt64(
  byte[] value,
  int startIndex
)

Parameters

BitConverter.ToUInt64 has the following parameters.

• value - An array of bytes.
• startIndex - The starting position within value.

Returns

BitConverter.ToUInt64 method returns A 64-bit unsigned integer formed by the eight bytes beginning at startIndex.

Example

The following code example converts elements of Byte arrays to UInt64 values with the ToUInt64 method.

using System;//from w  ww .  j  a  v  a2s .co m

class BytesToUInt64Demo
{
    public static void Main( )
    {
        byte[ ] bytes = {
            255, 255, 255,   0,   0,   0,   0,   0,   0,   0, 
            170, 170, 170, 170, 170,   0,   0, 232, 137,   4, 
             35, 199, 138, 255, 255, 255, 255, 255, 255, 255, 
            255, 127 };

        ulong value = BitConverter.ToUInt64( bytes, 2 );

        Console.WriteLine(value );
    }
}

The code above generates the following result.