(IL)Intermediate Language is also known as MSIL (Microsoft Intermediate Language) or CIL

(Common Intermediate Language). All .NET source code is compiled to IL. This IL is then

converted to machine code at the point where the software is installed, or at run-time by a Just-In-

Time (JIT) compiler.

Value, and its datatype depends on whatever variable we’re changing.

Place a colon and then the name of the base class. Notice that it’s double colon in C++.

No, use interfaces instead.  

Classes in the same namespace.