Question

I got a List that I add to every time I create a new Employee.
The content of this list is then displayed in a Listbox. The problem is that each time
I add a new Employee and then call the below method the items in the listbox gets duplicated over and over again. So if I got 3 items in the list the Listbox displays 6.
I have checked with employeeList.Count and I am sure about the amount of items in the list.

What is wrong?

public void UpdateEmployeeList()
{
    foreach (Employees values in employeeRegistry.employeerList)
    {
       lstResults.Items.Add(values);
    }
}

Thankful for all help!

Answer 1

Have you Clear your listbox before adding new employees ?

public void UpdateEmployeeList()
{
    lstResults.Items.Clear();
    foreach (Employees values in employeeRegistry.employeerList)
    {
       lstResults.Items.Add(values);
    }
}