I have the code below.
sometime it doesn't show the controls inside
<telerik:RadBusyIndicator x:Name="ProgressIndicator">
<telerik:RadBusyIndicator.BusyContent>
<StackPanel>
<TextBlock Name="ProgressStatus" HorizontalAlignment="Center" Grid.Row="0" />
<telerik:RadButton Name="CancelButton" Content="Cancel" Click="CancelButton_Click" Margin="5" Grid.Row="1"/>
</StackPanel>
</telerik:RadBusyIndicator.BusyContent>
</telerik:RadBusyIndicator>
Attached below what it show when control is not showing