Question

I have the following simple code

abstract class A
{
    public abstract void Test(Int32 value);
}

class B : A
{
    public override void Test(Int32 value)
    {
        Console.WriteLine("Int32");
    }

    public void Test(Double value)
    {
        Test((Int32)1);
    }
}

When I ran this code the line Test((Int32)1) causes stack overflow due to infinite recursion. The only possible way to correctly call proper method (with integer parameter) I found is

(this as A).Test(1);

But this is not appropriate for me, because both methods Test are public and I am willing the users to be able to call both method?

Answer 1

Unfortunately in order to call the A::Test(int) through a B reference some sort of cast is needed. So long as the C# compiler sees the reference through B it will pick the B::Test(double) version.

A slightly less ugly version is the following

((A)this).Test(1);

Another thought though is have a private method with a different name that both feed into.

class B : A { 
  public override void Test(int i) {
    TestCore(i);
  }
  public void Test(double d) {
    TestCore(1);
  }
  private void TestCore(int i) {
    // Combined logic here
  }
}