Currently we are working on providing functionality for attaching and detaching persistent capable objects to an OpenAccessContext instance. We will do our best to finish the implementation for the upcoming release.
What you could do to detach persistent object from the context is to deserialize it. This help article
shows how to achieve that goal. You need to expose the underlying IObjectScope object. The OpenAccessContextBase class has a method named GetScope, which could be used. You could also extend your domain context with another partial class and add the following property, if it makes it easier to access:
Hope that helps.
the Telerik team
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