CommonControlsTextBoxStyle.xaml

<ResourceDictionary
    x:Uid="ResourceDictionary_1"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:vsfx="clr-namespace:Microsoft.VisualStudio.Shell;assembly=Microsoft.VisualStudio.Shell.15.0"
    xmlns:vs="clr-namespace:Microsoft.VisualStudio.PlatformUI;assembly=Microsoft.VisualStudio.Shell.15.0">

    <Style x:Uid="Style_1" TargetType="{x:Type TextBox}" x:Key="{x:Static vsfx:VsResourceKeys.TextBoxStyleKey}">
        <Setter x:Uid="Setter_2" Property="Background" Value="{DynamicResource {x:Static vs:CommonControlsColors.TextBoxBackgroundBrushKey}}" />
        <Setter x:Uid="Setter_3" Property="Foreground" Value="{DynamicResource {x:Static vs:CommonControlsColors.TextBoxTextBrushKey}}" />
        <Setter x:Uid="Setter_4" Property="BorderBrush" Value="{DynamicResource {x:Static vs:CommonControlsColors.TextBoxBorderBrushKey}}" />
        <Setter x:Uid="Setter_12" Property="Template">
            <Setter.Value>
                <ControlTemplate x:Uid="ControlTemplate_1" TargetType="{x:Type TextBoxBase}">
                    <Border x:Uid="border" x:Name="border" BorderBrush="{TemplateBinding BorderBrush}" BorderThickness="{TemplateBinding BorderThickness}" Background="{TemplateBinding Background}" SnapsToDevicePixels="True">
                        <ScrollViewer x:Uid="PART_ContentHost" x:Name="PART_ContentHost" Focusable="False" HorizontalScrollBarVisibility="Hidden" VerticalScrollBarVisibility="Hidden" />
                    </Border>
                </ControlTemplate>
            </Setter.Value>
        </Setter>
        <Style.Triggers>
            <Trigger x:Uid="Trigger_1" Property="IsKeyboardFocused" Value="True">
                <Setter x:Uid="Setter_5" Property="Background" Value="{DynamicResource {x:Static vs:CommonControlsColors.TextBoxBackgroundFocusedBrushKey}}" />
                <Setter x:Uid="Setter_6" Property="Foreground" Value="{DynamicResource {x:Static vs:CommonControlsColors.TextBoxTextFocusedBrushKey}}" />
                <Setter x:Uid="Setter_7" Property="BorderBrush" Value="{DynamicResource {x:Static vs:CommonControlsColors.TextBoxBorderFocusedBrushKey}}" />
            </Trigger>
            <Trigger x:Uid="Trigger_2" Property="IsEnabled" Value="False">
                <Setter x:Uid="Setter_8" Property="Background" Value="{DynamicResource {x:Static vs:CommonControlsColors.TextBoxBackgroundDisabledBrushKey}}" />
                <Setter x:Uid="Setter_9" Property="Foreground" Value="{DynamicResource {x:Static vs:CommonControlsColors.TextBoxTextDisabledBrushKey}}" />
                <Setter x:Uid="Setter_10" Property="BorderBrush" Value="{DynamicResource {x:Static vs:CommonControlsColors.TextBoxBorderDisabledBrushKey}}" />
            </Trigger>
        </Style.Triggers>
    </Style>
</ResourceDictionary>