EditableTextBlock.xaml

<Style x:Key="EditableTextBlockStyle" TargetType="TextBox">
    <Setter Property="OverridesDefaultStyle" Value="True"/>
    <Setter Property="BorderBrush" Value="{x:Null}"/>
    <Setter Property="Background" Value="{x:Null}"/>
    <Setter Property="BorderThickness" Value="0"/>
    <Setter Property="Margin" Value="-2,-1,-2,-1"/>
    <Setter Property="AllowDrop" Value="true"/>
    <Setter Property="MaxLines" Value="1"/>
    <Setter Property="FocusVisualStyle" Value="{x:Null}"/>
    <Setter Property="VerticalAlignment" Value="Top"/>
    <Setter Property="ScrollViewer.PanningMode" Value="VerticalFirst"/>
    <Setter Property="Stylus.IsFlicksEnabled" Value="False"/>
    <Setter Property="Focusable" Value="True"/>
</Style>
<Style TargetType="{x:Type controls:EditableTextBlock}" BasedOn="{StaticResource {x:Type TextBox}}">
    <Setter Property="Template">
        <Setter.Value>
            <ControlTemplate TargetType="{x:Type controls:EditableTextBlock}">
                <TextBox Text="{TemplateBinding Text}" Style="{StaticResource EditableTextBlockStyle}"/>
            </ControlTemplate>
        </Setter.Value>
    </Setter>
</Style>