Hello Rohit,

Thank you for your feedback. I am glad that now the performance is as you expected.

Sorry with what you suggested, try the first three buttons in the sample, then scroll. The performance is horrible with what you suggested.

If i set the width/height of the grid performance is miles better. I have now bounded the width/height of the grid to scrollviewer actual width/height, with that performance is what i expected

Hello Rohit,

I have been looking into your question and currently the best approaches for disabling the virtualization of the XamGrid are suggested in the referred link from our online documentation. It is great that you have managed to solve your main issue with the scrollbar. I can suggest you use a Grid panel instead of StackPanel like e.g. :

<Grid x:Name="grid" >

            <Grid.RowDefinitions>

                <RowDefinition Height="Auto"/>

                <RowDefinition Height="Auto"/>

                <RowDefinition Height="Auto"/>

                <RowDefinition />

            </Grid.RowDefinitions>

            <Button Width="100" Grid.Row="0" Height="50" Content="Add Items" Click="ButtonBase_OnClick"></Button>

            <Button Width="100" Grid.Row="1" Height="50" Content="Apply Layout" Click="ApplyLayout"></Button>

            <Button Width="100" Grid.Row="2" Height="50" Content="Begin Add" Click="BeginTimer"></Button>

            <ScrollViewer Grid.Row="3" x:Name="scrollViewer" HorizontalScrollBarVisibility="Auto" VerticalScrollBarVisibility="Auto"  CanContentScroll="True">

                <ig:XamGrid x:Name="xamGrid" AutoGenerateColumns="False" ScrollViewer.HorizontalScrollBarVisibility="Auto" ScrollViewer.VerticalScrollBarVisibility="Auto"></ig:XamGrid>

            </ScrollViewer>

        </Grid>

Let me know, if you need any further assistance on this matter.