TextBox , different ControlTemplate + IsEnabled - wpf

Question

I have added a style to a textbox, where in I modify the ControlTemplate of the textBox.
I end up having a different control template for the textbox.
But I have a problem.
When I set the IsEnabled property to false, the normal textbox, is just greyed out.
But the one with different control template, still remains white.
Is there something specific I need to add as a part of control template, in order to obtain the default behavior?
thanks
Sandeep
Update -> Added the control template.
<ControlTemplate TargetType="{x:Type commonControls:DerivedTextBox}">
<Border Name="Border"
CornerRadius="2"
Padding="2"
BorderThickness="1">
<Border.Background>
<SolidColorBrush Color="{DynamicResource ControlLightColor}" />
</Border.Background>
<Border.BorderBrush>
<SolidColorBrush Color="{DynamicResource BorderMediumColor}" />
</Border.BorderBrush>
<VisualStateManager.VisualStateGroups>
<VisualStateGroup x:Name="CommonStates">
<VisualState x:Name="Normal" />
<VisualState x:Name="Disabled">
<Storyboard>
<ColorAnimationUsingKeyFrames Storyboard.TargetName="Border"
Storyboard.TargetProperty="(Panel.Background).(SolidColorBrush.Color)">
<EasingColorKeyFrame KeyTime="0"
Value="{DynamicResource ControlLightColor}" />
</ColorAnimationUsingKeyFrames>
</Storyboard>
</VisualState>
<VisualState x:Name="ReadOnly">
<Storyboard>
<ColorAnimationUsingKeyFrames Storyboard.TargetName="Border"
Storyboard.TargetProperty="(Border.BorderBrush).(SolidColorBrush.Color)">
<EasingColorKeyFrame KeyTime="0"
Value="{StaticResource DisabledControlDarkColor}" />
</ColorAnimationUsingKeyFrames>
</Storyboard>
</VisualState>
<VisualState x:Name="MouseOver" />
</VisualStateGroup>
</VisualStateManager.VisualStateGroups>
<ScrollViewer Margin="0"
x:Name="PART_ContentHost" />
</Border>
</ControlTemplate>

Answer 1

You have replaced the default XAML that makes the TextBox 'grayed out' when IsEnabled is set to False. If you want to replace this functionaluity, you will need to copy that part of the original ControlTemplate, which you can find at the TextBox Styles and Templates page on MSDN.
In the default ControlTemplate, you will see a VisualState with the name Disabled... that is what you need, but you may as well copy most of the VisualStates from there.
<VisualState x:Name="Disabled">
<Storyboard>
<ColorAnimationUsingKeyFrames Storyboard.TargetName="Border"
Storyboard.TargetProperty="(Panel.Background).(SolidColorBrush.Color)">
<EasingColorKeyFrame KeyTime="0"
Value="{StaticResource DisabledControlLightColor}" />
</ColorAnimationUsingKeyFrames>
</Storyboard>
</VisualState>