Question

Can we hide the derived class public method so that it is not accessible in Main() function in C#. We can’t change the accessors of the derived class method.

public class A
{
    public void Add()
    {
    }    
}       

public class B : A 
{
    public void Multiply()
    {
    }        
}

In main() method in C#

B b = new B();
b.mulitply(); // should give compile time error... Like method not founded.

Is there any way we can do it.

Answer 1

Why don’t you just just make the method private?

public class B: A
{
  private void Multiply()
  {
  }
}

If you absolutely can’t change B, then the only thing I can think of is creating a full adapter class.

public C
{
  private B instance;

  private void Multiply(){}

  public void Add()
  {
    B.Add();
  }
}

That will force you to “replicate” all the methods in B excepts the one you want.

If you ABSOLUTELY need the class to be “B” you’ll have to reverse engine it with reflector and change public field to private or protected.