namespace System { public interface IConvertible { TypeCode GetTypeCode(); bool ToBoolean(IFormatProvider provider); byte ToByte(IFormatProvider provider); char ToChar(IFormatProvider provider); DateTime ToDateTime(IFormatProvider provider); decimal ToDecimal(IFormatProvider provider); double ToDouble(IFormatProvider provider); short ToInt16(IFormatProvider provider); int ToInt32(IFormatProvider provider); long ToInt64(IFormatProvider provider); sbyte ToSByte(IFormatProvider provider); float ToSingle(IFormatProvider provider); string ToString(IFormatProvider provider); object ToType(Type conversionType, IFormatProvider provider); ushort ToUInt16(IFormatProvider provider); uint ToUInt32(IFormatProvider provider); ulong ToUInt64(IFormatProvider provider); } }