modified some styles

src/Shared/HandyControl_Shared/Themes/Styles/Base/TextBoxBaseStyle.xaml

@@ -32,7 +32,7 @@
     </Style>
 
     <Style x:Key="TextBoxBaseStyle" TargetType="TextBox">
-        <Setter Property="Height" Value="{StaticResource DefaultControlHeight}"/>
+        <Setter Property="MinHeight" Value="{StaticResource DefaultControlHeight}"/>
         <Setter Property="Background" Value="{DynamicResource RegionBrush}"/>
         <Setter Property="BorderBrush" Value="{DynamicResource BorderBrush}"/>
         <Setter Property="Foreground" Value="{DynamicResource PrimaryTextBrush}"/>