C# QUESTIONS asked at Charter/Spectrum

In C#, an interface is used to define the outer abilities of a class. An abstract class is used to define the actual identity of a class and it is used as the object or the same type. In C#, an interface is used if various implementations only shared method signatures.

A feature in C# that allows defining a class or method with type as a parameter. They allow for designing  classes and methods whose types are specified only at the time of declaration and instantiation.

The using keyword has three major uses:

• defines a scope at the end of which an object will be disposed.
•  creates an alias for a namespace or imports types defined in other namespaces.
• using static directive imports the members of a single class.