<UserControl x:Class="LLNet.Modules.Library.Views.Test" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:llc="clr-namespace:LLNet.Layout;assembly=Canvas"> <ContentControl> <llc:LLMainCanvas/> </ContentControl> </UserControl>The assembly that this is in has a reference to the project for the 'Canvas' assembly. When this runs I get the following exception: