Question

I have code like

public class TestA
{
    public string ColA { get; set; }
    public string ColB { get; set; }
    public string ColC { get; set; }
    public void MethodA()
    {
        MessageBox.Show("Original A1.");
    }
}

static class ExtenstionTest
{
  
    public static void MethodA(this TestA A1)
    {
        MessageBox.Show("Extended A1.");
    }
}

Now if I call MethodA like

TestA a = new TestA();
        a.MethodA();

It will always call Original method. How can I call the extension method.

Answer 1

You can’t call the extension method as a normal extension method. The instance method overrides the extension method with the same signature

EDIT:

You can call it as a static method

ExtensionTest.MethodA(a);