Blur flowdocument in WPF

[Ayub1987]

I'm looking a way to blur `FlowDocument` like this:

FlowDocument doc = new FlowDocument();
BlurEffect blur = new BlurEffect();
blur.Radius = 10;
doc.Effect = blur; // it doesn't work! (FlowDocument doesn't have Effect property)

**Update:**

Above code is a part of a `Converter` which return `FlowDocument` for using in a `FlowDocumentScrollViewer`. Some items (returned flow documents) have specific conditions which should be blurred.

<DataGrid ItemsSource="{Binding Items}">
<DataGrid.Columns>
<DataGridTemplateColumn>
<DataGridTemplateColumn.CellTemplate>
<DataTemplate>
<FlowDocumentScrollViewer
Document="{Binding ., Converter={StaticResource ItemToFlowDocConverter}}"/>
</DataTemplate>
<DataGridTemplateColumn.CellTemplate>
</DataGridTemplateColumn>
</DataGrid.Columns>
</DataGrid>

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