Thank you for bringing up the question. Unfortunately, you can not mock a field since mocking happens by intercepting method body therefore you can mock properties (which has a get/ set method), events (add / remove method) and other methods.
This is not something limited for JustMock but it is more or less general and the nature of .net IL.
the Telerik team
Explore the entire Telerik portfolio by downloading the Ultimate Collection trial package. Get it now >>