Write a program in C# Sharp to find the prime numbers within a range of numbers

using System;  
public class Exercise34 
{  
    public static void Main()
{
    int num,i,ctr,stno,enno;
	
	Console.Write("\n\n");
    Console.Write("Find the prime numbers within a range of numbers:\n");
    Console.Write("---------------------------------------------------");
    Console.Write("\n\n");  	

    Console.Write("Input starting number of range: ");
    stno = Convert.ToInt32(Console.ReadLine()); 	
    Console.Write("Input ending number of range : ");
    enno = Convert.ToInt32(Console.ReadLine()); 	
    Console.Write("The prime numbers between {0} and {1} are : \n",stno,enno);
  
    for(num = stno;num<=enno;num++)
       {
         ctr = 0;

         for(i=2;i<=num/2;i++)
            {
             if(num%i==0){
                 ctr++;
                 break;
             }
        }
        
         if(ctr==0 && num!= 1)
             Console.Write("{0} ",num);
    }
    Console.Write("\n"); 
  } 
}