using System;
 
public class Test
{
	public static void Main()
	{
		// your code goes here
		InvitationalSurvey iservey = new InvitationalSurvey();
		iservey.DoSomething(1, 1, 1);
		iservey.DoSomething(1);
	}
}
 
public abstract class BaseSurvey
{
 
}
public class InvitationalSurvey: BaseSurvey
{
	public void DoSomething(int param1, int param2 = 0, int param3 = 0)
    {
    //I don't need param2 and param3 here
    Console.WriteLine(string.Format("{0},{1},{2}",param1, param2, param3));
    }
}

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