WPF ListView grouping by 2 columns but display only 1 group header

Question

A ListView displays a collection of the following class:

public class Employee
{
    private string _department;
    private string _manager;
    private str         


        

Answer 1

Solved the main stumbling block, question 2 above: how to bind from the group header to a property that is not the grouping property.

The solution is to change the data context to:{Binding Items}. The ItemSource properties are then available