I am currently binding my XamTilesControl to a ObservableCollection of custom ViewModel objects with a data template defined elsewhere. 

How do I enable close on the tiles? 

The sample demo'd how to do this on a tile by tile basis, but I am databinding.

 <igTiles:Tile Header="Tile 3" Content="Removable Tile" CloseAction="RemoveItem" />

I have code like this:

 <igTiles:XamTilesControl
                Name="xamTilesControl1"
                Margin="2,0,0,0"
                HeaderPath="QueryText"
                ItemsSource="{Binding DataQueryViewModels}"
                >
                <igTiles:XamTilesControl.ItemTemplateMinimized>
                    <DataTemplate>
                        <TextBlock Margin="5, 2, 5, 2" Text="Expand for more Info" />
                    </DataTemplate>
                </igTiles:XamTilesControl.ItemTemplateMinimized>
            </igTiles:XamTilesControl>

Thanks.