<!--COMBOBOX-->
<Style x:Key="{x:Type ComboBox}" TargetType="ComboBox">
    <Setter Property="SnapsToDevicePixels" Value="true"/>
    <Setter Property="OverridesDefaultStyle" Value="true"/>
    <Setter Property="ScrollViewer.HorizontalScrollBarVisibility" Value="Auto"/>
    <Setter Property="ScrollViewer.VerticalScrollBarVisibility" Value="Auto"/>
    <Setter Property="ScrollViewer.CanContentScroll" Value="true"/>
    <Setter Property="MinWidth" Value="120"/>
    <Setter Property="Height" Value="25"/>
    <Setter Property="FontFamily" Value="Verdana" />
    <Setter Property="FontSize" Value="12" />
    <Setter Property="Validation.ErrorTemplate">
        <Setter.Value>
            <ControlTemplate>
                <DockPanel LastChildFill="true">
                    <Border x:Name="errorBorder" Background="Red" DockPanel.Dock="right" Margin="5,0,0,0" Width="10" Height="10" CornerRadius="10"
                            ToolTip="{Binding ElementName=customAdorner, Path=AdornedElement.(Validation.Errors)[0].ErrorContent}">
                        <TextBlock Text="!" VerticalAlignment="center" HorizontalAlignment="center" FontWeight="Bold" FontSize="8" Foreground="white" />
                    </Border>
                    <AdornedElementPlaceholder Name="customAdorner" VerticalAlignment="Center" >
                        <Border BorderBrush="red" BorderThickness="1" />
                    </AdornedElementPlaceholder>
                </DockPanel>
            </ControlTemplate>
        </Setter.Value>
    </Setter>
    <Setter Property="Template">
        <Setter.Value>
            <ControlTemplate TargetType="ComboBox">
                <Grid>
                    <ToggleButton
                        Name="ToggleButton"
                        Template="{StaticResource ComboBoxToggleButton}"
                        Grid.Column="2"
                        Focusable="false"
                        IsChecked="{Binding Path=IsDropDownOpen,Mode=TwoWay,RelativeSource={RelativeSource TemplatedParent}}"
                        ClickMode="Press">
                    </ToggleButton>
                    <ContentPresenter
                        Name="ContentSite"
                        IsHitTestVisible="False"
                        Content="{TemplateBinding SelectionBoxItem}"
                        ContentTemplate="{TemplateBinding SelectionBoxItemTemplate}"
                        ContentTemplateSelector="{TemplateBinding ItemTemplateSelector}"
                        Margin="3,3,23,3"
                        VerticalAlignment="Center"
                        HorizontalAlignment="Left" />
                    <TextBox x:Name="PART_EditableTextBox"
                        Style="{x:Null}"
                        Template="{StaticResource ComboBoxTextBox}"
                        HorizontalAlignment="Left"
                        VerticalAlignment="Center"
                        Margin="3,3,23,3"
                        Focusable="True"
                        Background="Transparent"
                        Visibility="Hidden"
                        IsReadOnly="{TemplateBinding IsReadOnly}"/>
                    <Popup
                        Name="Popup"
                        Placement="Bottom"
                        IsOpen="{TemplateBinding IsDropDownOpen}"
                        AllowsTransparency="True"
                        Focusable="False"
                        PopupAnimation="Slide">
                        <Grid
                        Name="DropDown"
                        SnapsToDevicePixels="True"
                        MinWidth="{TemplateBinding ActualWidth}"
                        MaxHeight="{TemplateBinding MaxDropDownHeight}">
                            <Border
                        x:Name="DropDownBorder"
                        Background="{StaticResource NormalBrush}"
                        BorderThickness="1"
                        BorderBrush="{StaticResource SolidBorderBrush}"/>
                            <ScrollViewer Margin="4,6,4,6" SnapsToDevicePixels="True">
                                <ScrollViewer.Background>
                                    <LinearGradientBrush StartPoint="0,0" EndPoint="0,1">
                                        <GradientStop Offset="0" Color="#DCDCD8"/>
                                        <GradientStop Offset=".91" Color="White"/>
                                    </LinearGradientBrush>
                                </ScrollViewer.Background>
                                <StackPanel IsItemsHost="True" KeyboardNavigation.DirectionalNavigation="Contained" />
                            </ScrollViewer>
                        </Grid>
                    </Popup>
                </Grid>
                <ControlTemplate.Triggers>
                    <Trigger Property="HasItems" Value="false">
                        <Setter TargetName="DropDownBorder" Property="MinHeight" Value="95"/>
                    </Trigger>
                    <Trigger Property="IsEnabled" Value="false">
                        <Setter TargetName="DropDownBorder" Property="BorderBrush" Value="#EEEEEE"/>
                        <Setter Property="Foreground" Value="#888888"/>
                    </Trigger>
                    <Trigger Property="IsGrouping" Value="true">
                        <Setter Property="ScrollViewer.CanContentScroll" Value="false"/>
                    </Trigger>
                    <Trigger SourceName="Popup" Property="Popup.AllowsTransparency" Value="true">
                        <Setter TargetName="DropDownBorder" Property="CornerRadius" Value="4"/>
                        <Setter TargetName="DropDownBorder" Property="Margin" Value="0,2,0,0"/>
                    </Trigger>
                    <Trigger Property="IsEditable" Value="true">
                        <Setter Property="IsTabStop" Value="false"/>
                        <Setter TargetName="PART_EditableTextBox" Property="Visibility"    Value="Visible"/>
                        <Setter TargetName="ContentSite" Property="Visibility" Value="Hidden"/>
                    </Trigger>
                    <Trigger Property="Validation.HasError" Value="true">
                        <Setter Property="Margin" Value="0 0 15 0" />
                    </Trigger>
                </ControlTemplate.Triggers>
            </ControlTemplate>
        </Setter.Value>
    </Setter>
</Style>