using System; using System.IO; class Test { public static byte[] DecimalToByteArray (decimal src) { using (MemoryStream stream = new MemoryStream()) { using (BinaryWriter writer = new BinaryWriter(stream)){ writer.Write(src); return stream.ToArray(); } } } public static decimal ByteArrayToDecimal (byte[] src) { using (MemoryStream stream = new MemoryStream(src)) { using (BinaryReader reader = new BinaryReader(stream)) { return reader.ReadDecimal(); } } } public static void Main() { byte[] b = BitConverter.GetBytes(true); // Convert a decimal to a byte array and display. b = DecimalToByteArray(12345678987654321.563846696m); Console.WriteLine(BitConverter.ToString(b)); // Convert a byte array to a decimal and display. Console.WriteLine(ByteArrayToDecimal(b)); } }