Question { 29526 }

what is the real use of interface in c#,other than that
multiple inheritance is not possible

Answer

When creating a standalone project which can be
changed at will, use an interface in preference to an
abstract class; because, it offers more design flexibility.

Use an interface to design a polymorphic hierarchy
for value types.

Use an interface when an immutable contract is
really intended.

A well-designed interface defines a very specific
range of functionality. Split up interfaces that contain
unrelated functionality.