stack and queue

See more:

C#

ok this is all my coding. i dont think length would be all that important to me ill just use count. the only problem im having is with enqueue. it expects class,delegate... to be used but ive tried to do that. im out of ideas hopefully i can solve it but a fresh mind would be good. cheers all

   public class patient
        {
            private string name;
            private string NHSN;
            private string urgency;
            private patient next()
            {}
            private patient next(string name, string NHSN, string urgency)
            {
                name = name;
                NHSN = NHSNnumber;
                urgency = urgency;
        }
        public string name
        {
            get { return name; }
            set { name value; }
        }
        public string NHSNnumber
        {
            get {return NHSN;}
            set { NHSN value; }
        }
            public string urgency
            { 
                get {return urgency;}
                set {urgency value;}
            }
      }
        public class Queue
        {
            private patient first;
            private patient last;
            public Queue patientqueue = new Queue();
            public Stack patientstack = new Stack();
                }
             public void enqueue(patient);////////////////heres enqueue
                 
        //static void Main(string[] args)
        {
            if(TextBox3.Text == "U")
            {
            patient U = new patient(textBox1.Text + textBox2.Text);
            }
           if(TextBox3.Text == "N")
            {
            patient N = new patient(textBox1.Text + textBox2.Text);
            }
            Queue queue = new Queue();
            Queue.patientqueue.enqueue(U);
            Queue.patientqueue.enqueue(N);
            Queue.enqueue(Queue.patientqueue);
             }
            public patient dequeue();
              {
            patient newpatient = new patient();
            patient patientnext = new patient(); //next in line examine 
            
            while (patientp.Count != 0)
            {
    if (patientstack.Count != 0)
    {
      if (patientp.Count > 0) 
        {
          patientnext = (patient)patientp.Peek(); 
        }
        if (patientnext.urgency == "U")
        { 
         newpatient = (patient)patientp.Dequeue();
         listBox1.ToString((textbox1.Text + textBox2.Text + textBox3.Text), newpatient.name);
        
        if (patientnext.urgency == "N")
        { 
            newpatient = (patient)patientnext.Pop();
           listBox1.ToString((textbox1.Text + textBox2.Text + textBox3.Text), newpatient.name);
        }
      }
    if (patientnext.Count == 0)
      
          {
            newpatient = (patient)patientp.Dequeue();
       
            if (patientp.Count > 0)
            { 
                patientnext = (patient)patientp.Peek();
            }
            if (newpatient.urgency == "U")
            {
                listBox1.ToString((textbox1.Text + textBox2.Text + textBox3.Text), newpatient.name);
            }
            if ((newpatient.urgency == "N") && (patientnext.urgency == "N"))
            {
                listBox1.ToString((textbox1.Text + textBox2.Text + textBox3.Text), newpatient.name);
            }
            if ((newpatient.urgency == "N") && 
               (patientnext.urgency == "U"))
            {
                patientnext.Push(newpatient);
                listBox1.ToString((textbox1.Text + textBox2.Text + textBox3.Text), patientnext.Count.ToString());
                listBox1.ToString((textbox1.Text + textBox2.Text + textBox3.Text), newpatient.name + NHSN);
            
                // get next
              newpatient = (patient)newpatient.Dequeue();
              listBox1.ToString((textbox1.Text + textBox2.Text + textBox3.Text), newpatient.name);                
            }
               }
              public int length();
              {
              new length = new Count;  
               }
               public bool isEmpty();
               if (enqueue.Count < 0)
                {
                  isEmpty == true;
                }    
             }
       public void button1_Click(object sender,EventArgs e)
        {
        if(textBox1.Text.Trim() != patientp.isEmpty)
        {
            patientp.Enqueue(textBox1.Text.Trim());
            listBox1.Items.Insert(listBox1.Items.length,
            "Added patient: " + textBox1.Text.Trim() + " At " + DateTime.Now.ToString());
        }
        else
        {
            listBox1.show("Empty Value Cannot be Added","QueueDemo");
        }
    }
    public void button2_Click(object sender, EventArgs e)
    {
        try
        {
           listBox1.show("Removed patient "  + 
            patientp.Dequeue().ToString());
            listBox1.Items.RemoveAt(0);
        }
        catch(Exception ex)
        {
            listBox1.show("Error: " + ex.Message); 
        }
public void button3_Click(object sender, EventArgs e)
{
    patient newpatient = new patient();
    Queue copyofpatientp = new Queue();
    copyofpaitenp = (Queue)patientp.Clone();
    listBox1.WriteLine(" ");
    listBox1.Show("View the queue using a copy");
    do
    {
        tempCustomer = (BankCustomer)copyoflocalQueue.Dequeue();
        listbox1.Items.add("Name: " + newpatient.name + ",number: " + newpatient.NHSN + 
                          ",  urgency: " + 
                          newpatient.urgency.ToString() + 
    } while (copyofpatientp.Count != 0);
}
      static void main()
    {
        Application.Run(new patientp());
    } 

;


What happens is the user puts in name and NHSN and then if U or N is put in, stack sorts them.