Applying style to all TextBoxes in a Grid?

Question

<Style x:Key="InputTBStyle" TargetType="TextBox">
<Setter Property="Background" Value="LightYellow"/>
<Setter Property="Width" Value="100"/>
</Style>
I have defined the style in the Applicatoin.Resource. I could apply the style to each textbox in a grid like so:
<TextBox Style="{DynamicResource InputTBStyle}" x:Name="PdTxtbox" HorizontalAlignment="Left" Height="23" Text="10" Grid.Row="2" Grid.Column="1"/>
But I am looking for a way that I could applying it to all the Textboxes in a Grid in one go (if possible)? 
Note: Without sacrificing efficiency and memory. 

Answer 1

You could add a style without an x:Key that is based on InputTBStyle to the resources section of the Grid:
<Grid>
<Grid.Resources>
<Style TargetType="TextBox" BasedOn="{StaticResource InputTBStyle}"/>
</Grid.Resources>
<TextBox/>
<TextBox/>
</Grid>
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