What's new in .net 4 for MVVM?

Does .net 4开发者_如何学JAVA add anything new for working with MVVM?

Not much... however, there has been one useful addition : InputBinding.Command and InputBinding.CommandParameter are now bindable dependency properties, which makes it much easier to handle keyboard and mouse events

For Silverlight 4.0, although not .NET 4.0, we now have the ICommand on Buttonbase which allows for easier binding of commands to buttons.

No.

Some say that WPF was built with MVVM in mind, so the needed features were there from the start.