alternative to base keyword in static method of derived class to call overrided method of base class

Question

i have following code

    class A{
            public void display()
            {
                    Console.WriteLine("In class A");
            }
    }
    class B:A{
            public void display()
            {
                    Console.WriteLine("In class B");
            }
            public static void show()
            {
                    //base.display(); gives error
            }
    }

in above code base.display(); gives error.I have to call the base class method display() in method show() without creating object of class A.how can i do this? or I can't do this?

Answer 1

A static method does not belong to an instance, hence it has no base . You can only say A.display() if A.display() is also a static method. You can also say new A().display() to discard the instance after calling display() .

Answer 2

You cannot use instance data in a static method.

A static method should be self-contained. This is to say that it will perform its function without requiring or saving any stateful data.

 class A{
            public static void display()
            {
                    Console.WriteLine("In class A");
            }
    }
      class B : A
      {
          public void display()
          {
              Console.WriteLine("In class B");
          }
          public static void show()
          {
              A.display(); 
          }
      }

Answer 3

You are getting error because you are calling an instance method from a static method which is not allowed.

You have 3 options here. You can choose whatever suits you well.

Option 1.

class A{
        public void display()
        {
                Console.WriteLine("In class A");
        }
}
class B:A{
        public void display()
        {
                Console.WriteLine("In class B");
        }
        public void show()
        {
                base.display();
        }
}

Option 2:

class A{
            public static void display()
            {
                    Console.WriteLine("In class A");
            }
    }
    class B:A{
            public void display()
            {
                    Console.WriteLine("In class B");
            }
            public void show()
            {
                    A.display();
            }
    }

Option 3:

class A{
            public void display()
            {
                    Console.WriteLine("In class A");
            }
    }
    class B:A{
            public void display()
            {
                    Console.WriteLine("In class B");
            }
            public void show()
            {
                    new A().display();
            }
    }