Thank you for writing.
In order to implement the desired behavior, you can use AnimatedPropertySetting objects. This type of objects provides a smooth animation between two different values of a property. A sample case of AnimatedPropertySetting usage can be found in this article
Please find attached a project which demonstrates how AnimatedPropertySetting can help in your case.
I hope you find this information helpful. If you have any other questions, do not hesitate to contact us.
the Telerik team
Do you want to have your say when we set our development plans? Do you want to know when a feature you care about is added or when a bug fixed? Explore the Telerik Public Issue Tracking
system and vote to affect the priority of the items