Revit.Plugln/FWindSoft/FWindSoft.Wpf/Themes/ErrorTemplate.xaml

<ResourceDictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
                    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
                    xmlns:controls="clr-namespace:FWindSoft.Wpf.Controls"
                    xmlns:wpf="clr-namespace:FWindSoft.Wpf">
    <ControlTemplate x:Key="ErrorTemplate">
        <Border BorderBrush="Red" BorderThickness="1">
            <AdornedElementPlaceholder/>
        </Border>
    </ControlTemplate>
    <Style x:Key="{x:Static wpf:ResourceKeys.ErrorTemplateKey}"  TargetType="Control">
        <Setter Property="Validation.ErrorTemplate" Value="{StaticResource ErrorTemplate}">
        </Setter>
        <Style.Triggers>
            <Trigger Property="Validation.HasError" Value="True">
                <Setter Property="ToolTip" Value="{Binding RelativeSource={RelativeSource Self}, Path=(Validation.Errors)[0].ErrorContent}"/>
            </Trigger>
        </Style.Triggers>
    </Style>

    <ControlTemplate x:Key="ErrorTemplate2">
        <DockPanel LastChildFill="true">
            <Border Background="Red" DockPanel.Dock="right" Margin="5,0,0,0" Width="20" Height="20" CornerRadius="10"
                    ToolTip="{Binding ElementName=customAdorner, Path=AdornedElement.(Validation.Errors)[0].ErrorContent}">
                <TextBlock Text="!" VerticalAlignment="center" HorizontalAlignment="center" FontWeight="Bold" Foreground="white">
                </TextBlock>
            </Border>
            <AdornedElementPlaceholder Name="customAdorner" VerticalAlignment="Center" >
                <Border BorderBrush="Red" BorderThickness="1" />
            </AdornedElementPlaceholder>
        </DockPanel>
      
    </ControlTemplate>

    <Style x:Key="{x:Static wpf:ResourceKeys.ErrorTemplateKey2}"  TargetType="Control" >
        <Setter Property="Validation.ErrorTemplate" Value="{StaticResource ErrorTemplate}">
        </Setter>
        <Style.Triggers>
            <Trigger Property="Validation.HasError" Value="True">
                <Setter Property="ToolTip" Value="{Binding RelativeSource={RelativeSource Self}, Path=(Validation.Errors)[0].ErrorContent}"/>
            </Trigger>
        </Style.Triggers>
    </Style>

    <ControlTemplate x:Key="{x:Static wpf:ResourceKeys.EmptyErrorTemplateKey}">
        <AdornedElementPlaceholder Name="customAdorner" VerticalAlignment="Center" >
        </AdornedElementPlaceholder>
    </ControlTemplate>

</ResourceDictionary>