Question

public class A
{
void methodA(int a){}
void methodA(ref int a){}
}

 static void Main()
  {
    int a=1;
    new classA().methodA(a);
  }

In Main class, which method is called? Are methods in class A are overloaded? can overriding is possible on the bases of value or reference parameters? Please help out to make me clear.

Answer 1

After fixing your code:

public class ClassA
{
    public void methodA(int a) 
    {
        Console.WriteLine("Without ref");
    }

    public void methodA(ref int a) 
    {
        Console.WriteLine("With ref");
    }
}

class Program
{
    static void Main(string[] args)
    {
        int i = 1;
        var a = new ClassA();

        a.methodA(i);
        a.methodA(ref i);

        Console.ReadKey(true);
    }
}

You’ll see that the first call will print ‘Without ref’ and the second ‘With ref’. You could’ve done this yourself.

The manual says it’s perfectly possible:

However, overloading can be done when one method has a ref or out parameter and the other has a value parameter, as shown in the following example.

class RefOverloadExample
{
    public void SampleMethod(int i) { }
    public void SampleMethod(ref int i) { }
}