Hi Manasa,
As of UI for Xamarin Q2 2017, you
do not need to manually declare the renderers anymore, Feel free to remove that from MainActivity.cs, iOS's AppDelegate.cs and UWP's MainPage.xaml.cs. Additionally, you no longer need to call TelerikForms.Init() either, you can safe remove that from each of those locations as well.
However, the error you're seeing may be signalling a more fundamental issue, it is likely occurring because you do not have all the dependencies installed.
Please see here for all the requirements for the RadAutoComplete control.
It sounds like you many have only installed the DataControls.Lite by itself. As seen in the documentation link I provide above, you also need
Telerik.XamarinForms.Input, too (if you want the light version, it would be Input.Lite)
Alternatively, you can install only the
Telerik.UI.for.Xamarin.Lite which will add the required dependencies for you. Here's a screenshot of the NuGet Package Manager with that package installed:
Regards,
Lance | Tech Support Engineer, Sr.
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