Playing with the trial to determine if I want to purchase. WPF 4.5.1
Using the Syncfusion Reference Manager, the Schedule throws the above exception at compile time.
I have only used it in Markup.
<Window x:Class="SyncfusionSchedule.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:syncfusion="http://schemas.syncfusion.com/wpf">
<Grid>
<syncfusion:Schedule />
</Grid>
</Window>
I'm afraid it doesn't look like a good option if I can't get past this.