How to call an explicitly implemented interface-method on the base class

Question

I have a situation, where two classes (one deriving from the other) both implement the same interface explicitly:

interface I
{
  int M();
}

class A : I
{
          


        

Answer 1

You can't call Explicit interface method in base class,here i solved this issue

I have two interface -> Interface1 and Interface2

public interface Interface1
{      
    string method2();      
}

public interface Interface2
{   
    string method22();

}

Main class Method

class Program
{
    static void Main(string[] args)
    {

        class1 cls = new class1();
        string str = cls.method2();
    }
}

and my interface implemented class

class class1 : Interface1, Interface2
{

    #region Interface1 Members

    public string method2()
    {
        return (this as Interface2).method22();
    }      

    #endregion

    #region Interface2 Members      

    string Interface2.method22()
    {
        return "2";
    }

    #endregion
}