gistfile1.txt

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

namespace sumApplication
{
    class Program
    {

        static public int sumFrom(int x, int y)
        {
            int result = 0;
            for (int i = 1; i < y + 1; i++)
                result = result + i;

            return result;

        }
        static void Main()
        {
            Console.WriteLine(sumFrom(1, 10000));
        }
    }
}