typesafe ObjectQuery in entity framework...

I've been doing this for about 3 hours, so I may have the wrong end of the
stick.

While doing the "hello world" type walkthrough I've come across....

            ObjectQuery<Department> departmentQuery =
                schoolContext.Department.Include("Course")
                .OrderBy("it.Name");

Now I'm a bit confused as to what an object query is, but this doesn't
look nice...."Course" and "it.Name"...are going to give me runtime errors
if (when) something changes.

I'm a bit confused as to how this sits with Linq....is there a Linq query
that I can use in the above which is typesafe and is of type
ObjectQuery<Department>?

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