<StackPanel Grid.Row="0" Grid.RowSpan="4" Background="#CFFF" Visibility="Visible" Orientation="Vertical" Name="ProgressOverlay">
            <Grid Name="Overlaygrid"">
                <StackPanel VerticalAlignment="Center" Grid.Row="0">
                    <ProgressBar
                     IsIndeterminate="True"
                     IsEnabled="True" Foreground="Black"/>
                    <TextBlock Visibility="Visible" Foreground="Black" FontSize="25” T HorizontalAlignment="Center" Text="Loading"/>
                </StackPanel>
            </Grid>
        </StackPanel>