Answer:   No, .NET supports only single inheritance due to the diamond problem. Also, it would add complexity when used in different languages. However, multiple interfaces can solve the purpose.

Answer:   Multiple inheritance is not supported by .NET using classes and to understand that you need to understand the Diamond problem first:

The Diamond problem is an ambiguity that arises when two classes B and C inherit from Class A and class D inherits from both B and C. If a method in D calls a method defined in A(and does not override the method), and B and C have overridden that method differently, then from which class does it inherit: B or C?

So, the solution is to use interfaces for multiple inheritance.