Method Overloading C#

using System;

public class sample
{
    //Function Overloading
    public int ADD(int a, int b)
    {
        return (a+b);
    }

    public int ADD(int a, int b, int c)
    {
        return (a+b+c);
    }
}
public class Program
{
    public static void Main()
    {
        sample ob = new sample();

        Console.WriteLine("a+b = "+ ob.ADD(10,20)); // ADD method with two paremeters
        Console.WriteLine("a+b+c = "+ ob.ADD(10,20,30)); // ADD method with three paremeters
    }
}