Public Interface IEmployee
    Property PersonelNumber As Integer
    Property Picture As String
    Property FirstName As String
    Property LastName As String
    Property Initials As String

    Property CurrentActivity As IActivity

    ''' <summary>
    ''' If an employee gets selected, it receives a number.
    ''' </summary>
    ''' <returns></returns>
    Property Number As Integer

    Function Equals(obj As Object) As Boolean
    Function ToString() As String
End Interface