I am using the very latest UI for WPF release (R3 for 2018). The release notes said that RadMultiColumnComboBox was available for use, albeit in beta. I wanted to try it but I cannot figure out where it is.
I tried replacing my XAML "<telerik:RadComboBox> tag with "<telerik:RadMultiColumnComboBox>" but Intellisense didn't know about it.
My current assembly references the following:
What assembly am I missing? I've tried searching the docs but I can't see anywhere they're telling me what assembly to reference