使用 Convert 类:
ToBoolean -> bool ToByte -> byte ToChar -> char ToDateTime -> DateTime ToDecimal -> decimal ToDouble -> double ToInt16 -> short ToInt32 -> int ToInt64 -> long ToSByte -> sbyte ToSingle -> float ToString -> string ToUInt16 -> ushort ToUInt32 -> uint ToUInt64 -> ulong ToBoolean -> bool ToByte
