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I think I found a bug that causes an InvalidOperationException with the timeline. If the timeline is empty and allowed to be sized to 0 height it will throw the exception.
In my case I have it in a row in a grid that is set to auto. When the program loads before the data is loaded into the timeline the exception happens.
This code will reproduce the issue.
In my case I have it in a row in a grid that is set to auto. When the program loads before the data is loaded into the timeline the exception happens.
This code will reproduce the issue.
<Grid x:Name="LayoutRoot"> <Grid.RowDefinitions> <RowDefinition Height="Auto" /> <RowDefinition /> </Grid.RowDefinitions> <telerik:RadTimeline /></Grid>