Abstract and interface C#

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why following is working?
public abstract class AbsClass
{
public void ShowData(){Console.WriteLine("some text");}
}

public interface IInterface
{
public void ShowData();
}
class otherclassName :AbsClass,IInterface
{
Static Void Main()
{
}
}

above class i have not implemented the interface ,but it is working without compile or Runtime error.

My dear c# techies, could you please explain. what i'm missing here.

What I have tried:

i have tried the same thing which has explained,but im not understand the basic.
please explain.

Posted 16-Jun-16 3:15am

rajaChowdare

Updated 16-Jun-16 3:32am

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OriginalGriff · Answer 1 · 2016-06-16T03:22:00

Assuming you correct that so it compiles:

C#

public abstract class AbsClass
    {
    public void ShowData() { Console.WriteLine("some text"); }
    }
public interface IInterface
    {
    void ShowData();
    }
class otherclassName : AbsClass, IInterface
    {
    static void Main()
        {
        }
    }

It doesn't matter: there is an implementation of a method with the required signature in the class via the abstract class definition. That is enough for the interface to be happy.
If it's a problem, you can explicitly declare a method for the Interface:

C#

class otherclassName : AbsClass, IInterface
    {
    void IInterface.ShowData()
        {
        ...
        }
    ...
    }

And the system will sort it out for you based on the type of variable you call the class from.

Sergey Alexandrovich Kryukov · Answer 2 · 2016-06-16T03:32:00

Solution 2

Please see my past answers referenced in this one: Why we need to create instance for interface not for implementation?.

—SA

Posted 16-Jun-16 3:32am

Sergey Alexandrovich Kryukov