or
System.Windows.Data Error: 26 : ItemTemplate and ItemTemplateSelector are ignored for items already of the ItemsControl's container type; Type='CustomTickMark'
<Grid> <telerik:RadGauge Height="50" HorizontalAlignment="Left" Margin="131,146,0,0" Name="radGauge1" VerticalAlignment="Top" Width="100"> <telerik:RadialScale x:Name="radialScale" IsEnabled="False" IsHitTestVisible="False" Min="0" Max="75" MinorTicks="1" MiddleTicks="2" MajorTicks="3"> <telerik:TickList> <telerik:CustomTickMark Value="10" Location="Inside" Offset="-0.02" Format="{}{0:N0}%" Length="1.3" TickWidth="0.02" Foreground="White" /> </telerik:TickList> </telerik:RadialScale> </telerik:RadGauge></Grid>