title: How change TextDecorations as Strikethrough?
body: <p>I'm trying to change inactive data with strikethrough decoration.</p>
  
  <pre><code>&lt;DataGrid.CellStyle&gt;
      &lt;Style TargetType="{x:Type DataGridCell}"&gt;
          &lt;Setter Property="IsTabStop" Value="True" /&gt;
          &lt;Setter Property="TextDecorations" Value="{Binding SelectedEntryType.TypeOfEntry, Converter={StaticResource DisplayValueToStrikethrough}}"/&gt;
      &lt;/Style&gt;
  &lt;/DataGrid.CellStyle&gt;
  </code></pre>
  
  <p>The problem is the following: <code>The member "TextDecorations" is not recognized or is not accessible.</code>
  I'm using MVVM design pattern.
  I already added the System.Windows dll. How can I fix this error? Thank you.</p>