Thank your for your interest in our controls.
Upgrading to a newer version is easy and does not require modifications of your code, unless there are breaking changes, which we rarely introduce. In most cases you have to just modify the references in your project. You can check this KB article for more ingformation: Updating RadControls for WinForms to another version or license
Telerik controls are very similar to the standard windows controls - certain events and properties are the same. . Our controls are more advanced, but generally speaking things are similar.
Low coupling is a desired feature of almost any software project, and in short, you can achieve that with our controls. To decouple your UI from the rest of your code you can either implement your own design patterns or better use CAB
which was created namely for this situation. Following the link you can find more information on CAB, general notes about Telerik integration with CAB, and Telerik CAB documentation.
I hope that this is a good starting point and thanks again for your interest in our controls. Please do not hesitate to contact me if you have further questions.
the Telerik team
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