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Take the following XAML:
Only two tiles are shown and only half the screen is filled. Remove one tile and all three are shown stretching along the whole screen.
<StackPanel Grid.Row="1"> <telerik:RadTileView x:Name="TileView1" MaxRows="1" MaximizeMode="Zero" IsItemDraggingEnabled="True" IsSelectionEnabled="True" SelectionMode="Single"> <telerik:RadTileViewItem Header="Test1"/> <telerik:RadTileViewItem Header="Test2"/> <telerik:RadTileViewItem Header="Test3"/> <telerik:RadTileViewItem Header="Test4"/> </telerik:RadTileView></StackPanel>Only two tiles are shown and only half the screen is filled. Remove one tile and all three are shown stretching along the whole screen.