Trying to retrieve objects in Collection Array List

Question

Can anyone give me any advice on the following.

Am trying to create code that shows the correct set of details when the Id number is entered.  When I access the collectioon arrayList (REGList), the same set of details are always displayed.  I cant seem to display the details in the collection arraylist for the relevant Id number.  I tried using a foreach loop but this still doesnt work.  The click event handler code am using is show below.

 private void btnSearch_Click(object sender, System.EventArgs e)
{    
  string Id = txtStudID.Text;
  if(txtStudID.Text == "")
   MessageBox.Show("Please enter the 5 digit Student ID number and try again");
foreach(object o in RegList)
  {
            int Item = 0;
   int count = 0;
   count++;
   
   if(o.GetType() == typeof(string))
   {
    if(o.ToString() == Id)
    {
     Item = count;
                   
     
     txtFirstnm.Text = RegList[Item + 1].ToString();
     txtLastnm.Text = RegList[Item + 2].ToString();
     txtAddress.Text = RegList[Item + 3].ToString();
     txtCity.Text = RegList[Item + 4].ToString();
     txtCourse.Text = RegList[Item + 5].ToString();
     txtEmail.Text = RegList[Item + 6].ToString();
     txtPhone.Text = RegList[Item + 7].ToString();
     txtComment.Text = RegList[Item + 8].ToString();

     

     
    } 
    
   }

   }
  } 

Thanks for any help