Hi,
I have found a strange bug with ResourceDictionary and VS 2k5, when running
a exe twice i get a "Item already added" error in ResourceDictionary.
Here is a code sample :

Code:

<Window x:Class="TestWinFX.Window1"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
Title="TestWinFX" Height="82" Width="141"
>
<!-- Resources -->
<Window.Resources>
<!-- Gradients -->
<LinearGradientBrush x:Key="MyGradient" StartPoint="0,0" EndPoint="0,1">
<LinearGradientBrush.GradientStops>
<GradientStop Color="#FFFFFFFF" Offset="0" />
<GradientStop Color="#FFFF0000" Offset="1" />
</LinearGradientBrush.GradientStops>
</LinearGradientBrush>
</Window.Resources>

<StackPanel VerticalAlignment="Center" HorizontalAlignment="Center"
Height="37" Width="99">
<Button VerticalAlignment="Center" HorizontalAlignment="Center"
Width="89" Height="27" Name="button1" Content="MyButton">
<Button.Template>
<ControlTemplate>
<Grid>
<Rectangle Stroke="Black" Fill="{DynamicResource MyGradient}"
RadiusX="5" RadiusY="5" />
<ContentPresenter
Content="{TemplateBinding Button.Content}"
HorizontalAlignment="{TemplateBinding
Button.HorizontalContentAlignment}"
VerticalAlignment="{TemplateBinding
Button.VerticalContentAlignment}"
/>
</Grid>
</ControlTemplate>
</Button.Template>
</Button>
</StackPanel>
</Window>

Build the projet, run it in debug, close the window, modify the file (add a
return anywhere), build and run, you have the bug.
Only solution i found is force a rebuild and not a build.



Any idea of where it comes from ?

Guillaume

I belive this is a known issue with the Feb CTP.
Unfortunately, the only work around is to clean/build.

This was a bug in newly implemented improvements in incremental build (an
attempt to build fewer xaml files each time you compiled).
Sorry.
Thx, Rob Relyea
WPF, PM
http://longhornblogs.com/rrelyea

"Guillaume" <Guillaume@discussions.microsoft.com> wrote in message
news:B9CC895E-F80F-4F31-863C-B2D9DABDE58B@microsoft.com...
> Hi,
> I have found a strange bug with ResourceDictionary and VS 2k5, when
> running
> a exe twice i get a "Item already added" error in ResourceDictionary.
> Here is a code sample :
>
>

Code:

> <Window x:Class="TestWinFX.Window1"
>  xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
>  xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
>  Title="TestWinFX" Height="82" Width="141"
>  >
>    <!-- Resources -->
>    <Window.Resources>
>      <!-- Gradients -->
>      <LinearGradientBrush x:Key="MyGradient" StartPoint="0,0"
> EndPoint="0,1">
>        <LinearGradientBrush.GradientStops>
>          <GradientStop Color="#FFFFFFFF" Offset="0" />
>          <GradientStop Color="#FFFF0000" Offset="1" />
>        </LinearGradientBrush.GradientStops>
>      </LinearGradientBrush>
>    </Window.Resources>
>
>    <StackPanel VerticalAlignment="Center" HorizontalAlignment="Center"
> Height="37" Width="99">
>      <Button VerticalAlignment="Center" HorizontalAlignment="Center"
> Width="89" Height="27" Name="button1" Content="MyButton">
>        <Button.Template>
>          <ControlTemplate>
>            <Grid>
>              <Rectangle Stroke="Black" Fill="{DynamicResource MyGradient}"
> RadiusX="5" RadiusY="5" />
>              <ContentPresenter
>                Content="{TemplateBinding Button.Content}"
>                HorizontalAlignment="{TemplateBinding
> Button.HorizontalContentAlignment}"
>                VerticalAlignment="{TemplateBinding
> Button.VerticalContentAlignment}"
>              />
>            </Grid>
>          </ControlTemplate>
>        </Button.Template>
>      </Button>
>  </StackPanel>
> </Window>
>

>
> Build the projet, run it in debug, close the window, modify the file (add
> a
> return anywhere), build and run, you have the bug.
> Only solution i found is force a rebuild and not a build.
>
> Any idea of where it comes from ?
>
> Guillaume