محاسبه ی جذر عدد ورودی

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

namespace _18___Sqrt_numbers
{
class Program
{
static void Main(string[] args)
{

Console.WriteLine("please enter number for sqrt ");
int n = Convert.ToInt32(Console.ReadLine());
double sqrt;

sqrt = Math.Sqrt(n);
Console.WriteLine(sqrt);
Console.ReadKey();
//shmp30
}
}
}