The PullToRefresh functionality, although available in RadConversationView, is currently not officially supported because of some specifics of the control like having to display messages from bottom to top. The PullToRefresh indicator is currently displayed on top of the scrollable list and the gesture of requesting a data refresh is not suited for the Conversation View user experience.
Can you please share with us some more details on the scenario you would like to implement?
the Telerik team
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