Static Member :The static member is callable on a class even when no instance of the class has been created. The static member is always accessed by the class name, not the instance nameNon-static Member :

Access modifiers are keywords used to specify the declared accessibility of a member or a type. Access modifiers are an integral part of object-oriented programming.  There are 5 different types of Access Modifiers: 
1. Public.
2. Internal.
3. Private.
4. Protected.
5. Protected internal.

An interface is similar to a class, but it provides a specification rather than an implementation for its members. An interface contains definitions for a group of related functionalities that aclass or a struct can implement.