I updated my entity framework using "update-package -EntityFramework" command in package manager console. It updated Entity Framework pretty well, but stuck me with an issue. I was no longer able to debug my values and it showed "Children could not be evaluted" as shown below. This was working fine before I updated my entity framework.
The solution is really simple but tricky. I just had to add .ToList() at the end of the query and it worked like a charm.