I write C# WPF MVVM Prism 6 modular application. One of the modules has a view (Prism UserControl) with RadChartView. In this module I add references to the following assemblies: Telerik.Windows.Controls (ver. 2016.2.613.45), Telerik.Windows.Controls.Chart (ver. 2016.2.613.45), Telerik.Windows.Data (ver. 2016.2.613.45). (Just recently I upgrade Telerik binaries to the new version.) Then I add RadChartView into a view (Prism UserControl) that is in this module. But when I navigate to this view (where RadChartView is) then System.Windows.Markup.XamlParseException exception in PresentationFramework.dll has place. The error text is: Could not load file or assembly 'telerik.windows.controls.chart'. Why this error has place?