IDisposable.Dispose（）作为方法名称是什么意思？

Question

I was just tidying up some code when I found this region in the class:

    #region IDisposable Members

        void IDisposable.Dispose()
        {
        } 

     #endregion

Now understand that this is implementing the Dispose method for the IDisposable interface and I know that the class declaration says that this class will implement the IDisposable interface.

What I don't get is why it reads:

void IDisposable.Dispose()

And not:

public void Dispose()

I guess that the IDisposable.Dispose indicated explicitly that this is the Dispose that implements the IDisposable interface? Is this correct and what's the advantage of doing this?

Answer 1

It is an explicit interface implementation .

It means that only a variable of type IDisposable can call Dispose on this class.

Doing so "hides" the Dispose method when used with a variable of the class type - it will not be able to call it directly without first casting to IDisposable . It is possible that the implementer did this on purpose.

Additionally, if the class were to implement its own Dispose (or inherit/implement from a class/interface that also defines a Dispose method), this will allow multiple implementations to exist.

Answer 2

That's an explicit interface implementation . Useful if a class implements several interfaces that have the same methods.