System.TypeCode public enum TypeCode Documentation Boolean = 3 Byte = 6 Char = 4 DateTime = 16 DBNull = 2 Decimal = 15 Double = 14 Empty = 0 Int16 = 7 Int32 = 9 Int64 = 11 Object = 1 SByte = 5 Single = 13 String = 18 UInt16 = 8 UInt32 = 10 UInt64 = 12