My Wall, C# - rextester

My Wall

//Rextester.Program.Main is the entry point for your code. Don't change it.
//Compiler version 4.0.30319.17929 for Microsoft (R) .NET Framework 4.5

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

namespace Rextester
{
    public class Program
    {
        public static void Main (string[] args) {
            Console.WriteLine ("See if number is prime.");
            string readNumber = Console.ReadLine();
            int useNumber = Int32.Parse(readNumber);
            string result = Calculate(useNumber);
            Console.WriteLine(result);
            
        }
        
        public static string Calculate(int number){
            string isPrime = "Is Prime";
            string notPrime = "Not Prime"; 
            int checkNumber = (2^number-2)%number; 
                if (checkNumber == 0) 
                return isPrime;
            
            else
                return notPrime;
                          
        }
        
    }
}


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