using System;

public class Program

{

    public static void Main()

    {

        public static class customer

{

​

    public int getData(int id)

    {

     return 1;

    }

​

    public int getData(int id,string name=null)

    {

     return 2;

    }

​

    public int getData(int id,string name=null,string location)

    {

      return 3;

    }

​

}

​

​

    public static int GetClientData()

    {

        int x = customer.getData(1,"demo");

        return x;

    }

​

​

​

    }

}