D language and .NET platform

[EngineerSpock]

There is a couple of questions.

1. What about interoperability of D and .NET platform?
2. What is the difference between pure D and D for .NET?
3. Can I write code on pure D and then compile it to MSIL and use 
it further in .NET environment?
4. Are there many libraries for D? Can D just use C\C++ dll's 
without pain for programmer?

Thank you in advance)))