Default implementation of a method for C# interfaces?

Question

Is it possible to define an interface in C# which has a default implementation? (so that we can define a class implementing that interface without implementing that particul

Answer 1

Short Answer:

No, you cannot write implementation of method in interfaces.

Description:

Interfaces are just like contract ,so that the types that will inherit from it will have to define implementation, if you have a scenario you need a method with default implementation, then you can make your class abstract and define default implementation for method which you want.

For Example:

public abstract class MyType
{
    public string MyMethod()
    {
      // some implementation
    }

    public abstract string SomeMethodWhichDerivedTypeWillImplement();
}

and now in Dervied class:

public class DerivedType : MyType
{
  // now use the default implemented method here
}

UPDATE (C# 8 will have support for this):

C# 8 will allow to have default implementation in interfaces