Is it possible to declare a partial class in two projects

Question

Consider we create a partial class in Project1 and we have a Project2 that has reference to Project1 .How is it possible t

Answer 1

The partial construct is only a compiler functionality, to allow a class to be spread out in several source files. The compiled class still lives in one and only one class library (dll file).

There are two ways to extend a class in another library:

• Inheritance, unless the class is sealed. This requires that the calling code handles all object instantiation to instantiate the new derived class.
• Extension methods, which makes the code look like there are new methods on that class, but that is just syntactic sugar. It won't change the class itself.