Why aren't new WPF Windows I create inheriting from Window?

Question

When I create a new Window, using the Add Item... dialogue, the Window I create, e.g. NewWindow, does not inherit from Window. It only has the same interface as type Object. An example:

I have the popup window code below. The code only sees the IHavePassword members, and not the rest of the members of `LoginPopup', like its controls.

Public Class LoginPopup
    Implements IHavePassword

    Public ReadOnly Property Password As SecureString Implements IHavePassword.Password
        Get
            'Return Me.PasswordBox.????
        End Get
    End Property

    Public Event PasswordChanged As RoutedEventHandler Implements IHavePassword.PasswordChanged
    Public Sub PassWordChangedHandler(sender As Object, e As EventArgs)
        PasswordChangedEvent(sender, e)
    End Sub

    Public Sub Close() Implements IHavePassword.Close
        Throw New NotImplementedException
    End Sub

End Class

OH, here is the necessary XAML as well:

<Window x:Class="ApptEase.Client.Prism.Views.LoginPopup"
....
<StackPanel Orientation="Vertical" Margin="0">
    <DockPanel LastChildFill="True">
        <TextBlock Text="{Binding Path=UsernameLabel}" DockPanel.Dock="Left" TextAlignment="Right" Margin="5,9,5,5" MinWidth="70" />
        <TextBox Text="{Binding Path=Username, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged, ValidatesOnDataErrors=True, NotifyOnValidationError=True}" Width="Auto" Margin="5" />
    </DockPanel>
    <DockPanel LastChildFill="True">
        <TextBlock Text="{Binding Path=PasswordLabel}" DockPanel.Dock="Left" TextAlignment="Right" Margin="5" MinWidth="70" />
        <PasswordBox x:Name="PasswordBox" PasswordChanged="PassWordChangedHandler" Width="Auto" Margin="5" />
    </DockPanel>
    <DockPanel LastChildFill="True" Height="59">
        <StackPanel Orientation="Horizontal" HorizontalAlignment="Right">
            <Button Content="Log in" Command="{Binding Path=LoginCommand}" CommandParameter="{Binding ElementName=This}" Margin="5" Padding="15,10,15,10" />
            <Button Content="Cancel" Command="{Binding Path=CancelCommand}" CommandParameter="{Binding RelativeSource={RelativeSource FindAncestor, AncestorType={x:Type Window}}}" Margin="5" Padding="15,10,15,10"/>
        </StackPanel>
    </DockPanel>
</StackPanel>

The IntelliSense on the property Me lists the members of IHavePassword, e.g:

I would expect to see the controls and base Window members here, not those of the interface. How do I go about fixing this?

Answer 1

I think you just forgot to surround the class with your namespace:

Namespace ApptEase.Client.Prism.Views
    Public Class LoginPopup
        Implements IHavePassword

        '...

    End Class
End Namespace