Armstrong No.(C# .Net)

        Using System;
Class Program
{
    Static void main()
    {
       int num,temp,sum=0.rem;
       Console.WriteLine("Enter a number");
       num=convert.ToInt32/(Console.ReadLine());
       temp=num;
       while(num>0)
       {
         rem=num%10;
         sum=sum+rem+rem+rem;
         num=num/10;
       }
       if (temp==sum)
       {
       Console.WriteLine("Armstrong Number");
       }
       else
       {
       Console.WriteLine("Not an Armstrong Number");
       Console.Readkey();
       }
    }
 }