WPF：更改ComboBox的ItemTemplate会删除在键入时跳转列表的功能。有任何解决这个问题的方法吗？

PersonVM.cs

PersonVM.cs

public class MainWindowVM
{
    public MainWindowVM()
    {
        PersonList = new ObservableCollection<Person>(Employees);
    }

    private Person[] Employees = new Person[]
    {
        new Person { ID = 1, Name = "Adam" },
        new Person { ID = 2, Name = "Bill" },
        new Person { ID = 10, Name = "Charlie" },
        new Person { ID = 15, Name = "Donna" },
        new Person { ID = 20, Name = "Edward" }
    };

    public ObservableCollection<Person> PersonList { get; set; }
}
public class MainWi