using System;

using System.Collections.Generic;

using System.Linq;

public class Program

{

    public static void Main()

    {

        List<int> list = Enumerable.Range(1,10).ToList();

        var startObject = 5;

        var skip = 7;

        var startIndex = list.IndexOf(startObject);

        if (startIndex + skip > list.Count){

            startIndex = 0 - (list.Count - startIndex);

        }

        var result = list[startIndex + skip];

        Console.WriteLine(result.ToString());

    }

}