Difference between Interface, abstract class, sealed class, static class and partial class in C#? [closed]

Answer 1

I guess following link will be useful for you.

http://letschattechnology.com/interface-vs-abstract-classes/

the basic logical difference is you create abstract class when there is a relation between two classes that will inherit the abstract class and you create interface for the classes which are not related to each other but do have some common functionality.