title: Implementation of Queue using Linked List- It creates the Linked List but stops working after it prints
body: <p>Here is what I have so far. I have generated a linked list but when the program prints the linked list out, a pop up comes up and it says my program has stopped working. I am using visual studio. I need to implement a queue using linked list. I am able to create it and print it out but when it prints out, the program stops. I have tried everything but I cannot seem to get this error to go away. This also happens when I try to use other methods in the linked list class but I did not include those methods.</p>
  
  <pre><code>using System;
  using System.Collections.Generic;
  using System.Linq;
  using System.Text;
  using System.Threading.Tasks;
  using System.IO; 
  
  namespace CSCI3230_Project2_Zack_Davidson
  {
  
      class Program
     {
  
        static void Main(string[] args)
        {
  
              int count = 0;
              LinkedList list = new LinkedList();
              for (int i = 1; i &lt;= 20; i++)
              {
                  list.Add(new Node(i));
                  count++;
              }
              Console.WriteLine("I have generated a queue with 20 elements. I have printed the       queue below.");
             list.PrintNodes();
  
         }
      }
  
      public class Node
      {
  
          public Node next;
          public int data;
          public Node(int val)
          {
              data = val;
              next = null;
          }
      }
  
      public class LinkedList
      {
         public  TimeSpan runTimer;
         public System.Diagnostics.Stopwatch
         stopwatch = new System.Diagnostics.Stopwatch();
  
         Node front;
         Node current;
  
          public void Add(Node n)
          {
              if (front == null)
              {
                  front = n;
                  current = front; 
              }     
              else
              {
                  current.next = n;
                  current = current.next; 
              }
  
          }
  
          public void PrintNodes()
          {
              Node print = front;
              while (front != null)
              {
                   Console.WriteLine(print.data);
                   print = print.next;
              }
  
              /*while (front != null)
              {
                  Console.WriteLine(front.data);
                  front = front.next;
              }*/
           }
   }//EndofNameSpace
  </code></pre>