Summation in C# -1

using System;

class Summation
{
    static void Main()
    {
        Console.Write("Enter the value of n: ");
        int n = Convert.ToInt32(Console.ReadLine());

        int sum = 0;
        for (int i = 1; i <= n; i++)
        {
            sum += i;
        }

        Console.WriteLine("The Summation of n is: {0}", sum);
    }
}