WPF

Public Class UtilityHelpers

#Region " Methods "

    Public Shared Sub StartProcessWithFileName(ByVal strFileName As String)

        'Start a process :  http://dotnet.mvps.org/dotnet/faqs/?id=openfileappwebpage&lang=en

        Dim psi As New System.Diagnostics.ProcessStartInfo
        psi.FileName = strFileName
        psi.UseShellExecute = True
        System.Diagnostics.Process.Start(psi)
    End Sub

#End Region

• Give your ListBox a name and in the forms loaded event (not constructor) listbox1.ItemSource = partTimeEmployees
• Use blend and add a datasource of type Employees, this will create a ObjectDataProvider and intialize its own Employees. Unless you fill the collection in the Employee constructor it'd likely be empty, that leads to the third option...
• Create a 'DataSource' object that has properties for PartTimeEmployees, Customers, e.t.c. Make this a singleton that returns an instance with all the data populated. Then use this like the previous option you'll probably have to edit the XAML as seen in the links below, you can then drag the PartTimeEmployees property onto the ListBox and a binding dialog will popup. This method works at design-time which is helpful but it can slow down blend so you might want to check if it is design-time and only return a few employees. See here and here for more info about ObjectDataProvider.