using System;

public class Program

{

    public static void Main()

    {

        decimal value = 4990.0000m;

        Int32[] bits = decimal.GetBits(value);

        Int32 scale = (bits[3] >> 15) & 0x01FE;

        Int32 sign  = (bits[3] >> 31) & 0x0001;

        UInt32 high =  (UInt32) bits[2];

        UInt64 low  = ((UInt64) bits[1] << 32) | ((UInt64) bits[0] & 0xFFFFFFFFL);

        UInt32 scaleSign = (uint)(scale | sign);

        Console.WriteLine(high);

        Console.WriteLine(low);

        Console.WriteLine(scaleSign);

    }

}

​

​