using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace ClassLibrary01
{
    public class Class1
    {

        public int Add(int i1, int i2 = 10)
        {
            return i1 + i2;
        }

        public int Add(int i1)
        {
            return Add(i1, 10);
        }

    }
}