Gaussian KernelType BlurBitmapEffect
<Window x:Class="WpfApplication1.Window1" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" Title="WPF" Height="300" Width="300"> <UniformGrid Columns="3" Rows="4"> <TextBlock Text="A TextBlock" FontSize="16" HorizontalAlignment="Center" VerticalAlignment="Center" /> <TextBlock Text="A TextBlock" FontSize="16" HorizontalAlignment="Center" VerticalAlignment="Center"> <TextBlock.BitmapEffect> <BlurBitmapEffect Radius="1" KernelType="Gaussian"/> </TextBlock.BitmapEffect> </TextBlock> </UniformGrid> </Window>