Bind Collection to StackPanel
Alright I have figured it out... Using an ItemsControl solved the problem...
<ItemsControl x:Name="tStack" Grid.Column="0">
<ItemsControl.ItemsPanel>
<ItemsPanelTemplate>
<StackPanel Orientation="Horizontal"/>
</ItemsPanelTemplate>
</ItemsControl.ItemsPanel>
<ItemsControl.ItemTemplate>
<DataTemplate>
<Button Content="{Binding ItemName}"/>
</DataTemplate>
</ItemsControl.ItemTemplate>
</ItemsControl>