validation doesnt work (message doesnt show) about fasetto-word

[Rainson12]

a fix would be to change the PageHost.xaml to
<AdornerDecorator> <Grid> <ContentControl x:Name="OldPage" /> <ContentControl x:Name="NewPage" /> </Grid> </AdornerDecorator>

[angelsix]

Works fine without any changes to latest source code

   <!-- Email -->
    <TextBox 
                Tag="Email"
                local:IsFocusedProperty.Value="True"
                >
        <TextBox.Text>
            <Binding Path="Email" UpdateSourceTrigger="PropertyChanged">
                <Binding.ValidationRules>
                    <local:NotEmptyValidationRule ValidatesOnTargetUpdated="True" />
                </Binding.ValidationRules>
            </Binding>
        </TextBox.Text>
        <Validation.ErrorTemplate>
            <ControlTemplate>
                <StackPanel>
                    <!-- Placeholder for the TextBox itself -->
                    <AdornedElementPlaceholder x:Name="textBox"/>
                    <TextBlock Text="{Binding [0].ErrorContent}" Foreground="Red"/>
                </StackPanel>
            </ControlTemplate>
        </Validation.ErrorTemplate>
    </TextBox>

No repro