Control Inheritance with Blend in Silverlight 3

Question

Hi,

i would like to create a custom base class for some of my UserControls. Doing this in VS2008 is fine and compiles as expected, but when i edit the control in Blend 3 the base class in the blabla.g.vb is always changed back to System.Windows.Controls.UserControl.

How can i force Blend to keep the assigned base class?

regards Christoph

Answer 1

Can you show your XAML?

I suspect the case is your XAML is like this:

<UserControl xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
             xmlns:local="clr-namespace:SilverlightApplication15"
             x:Class="SilverlightApplication15.MainPage"
             Width="640"
             Height="480">

    <Grid x:Name="LayoutRoot"
          Background="#FF313131" />
</UserControl>

When it should be something like:

<local:BlahBlah xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
                xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
                xmlns:local="clr-namespace:SilverlightApplication15"
                x:Class="SilverlightApplication15.MainPage"
                Width="640"
                Height="480">

    <Grid x:Name="LayoutRoot"
          Background="#FF313131" />
</local:BlahBlah>

The .g.vb file is generated from the XAML so it's not a file you should edit directly.