iconvertible

问题 .Net Framework base types such as Int32, Int64, Boolean etc,. implement IConvertible interface but the metadata of these types do not contain the implementations of the methods defined in IConvertible interface such as ToByte, ToBoolean etc,. I am trying to understand why the base types do not have the method implementations even though they implements IConvertible interface. Could anyone please help on this? 回答1: Take a closer look at the documentation - Int32 implements IConvertible

问题 The Convert class has been in existence since .NET 1.0. The IConvertible interface has also existed since this time. The Convert.ChangeType method only works on objects of types that implement IConvertible (in fact, unless I'm mistaken, all of the conversion methods provided by the Convert class are this way). So why is the parameter type object ? In other words, instead of this: public object ChangeType(object value, Type conversionType); Why isn't the signature this? public object