WPF provides the facility of spell checking. It is available
in the following languages: English, Spanish, German and French. It can be
enabled by setting the attached property SpellCheck.IsEnabled
to true.
For
Example:
<Grid>
<TextBox Height="23"
HorizontalAlignment="Left"
SpellCheck.IsEnabled="True" Language="en-US"
Margin="10,10,0,0"
Name="textBox1" VerticalAlignment="Top"
Width="120" />
</Grid>