C# program to find Sum of first n Natural Numbers

Program

using System;
namespace SumOfFirstNIntegers
{
    class Program
    {
        static void Main(string[] args)
        {
            int  i, sum = 0;
            Console.Write("Enter the number of n to find sum of n integers:\t");
            int n = int.Parse(Console.ReadLine());                       
            for (i = 1; i <= n; i++)
            {
                sum = sum + i;                
            }
            Console.Write("The Sum of first {0} integers is : {1}\n", n, sum);
        }
    }
}

Output

Enter the number of n to find sum of n integers:        4
The Sum of first 4 integers is : 10