This note is a little bit misleading. In fact it has nothing to do with adding our controls to the toolbox. It is trying to say that you always have to add reference to Telerik.Windows.Controls
assembly in the references of your project. For example if you use only RadTreeView
which is in Telerik.Windows.Controls.Navigation
assembly, you still have to add Telerik.Windows.Controls
to your references as it contains some basic classes which are used in all other assemblies. Same with Telerik.Windows.Data
As this note is not related to adding our controls to the toolbox, just continue with the instructions below to add RadControls to the VS toolbox. Please let me know if you have more questions.
the Telerik team