LINQ, Unable to create a constant value of type XXX. Only primitive types or enumeration types are supported in this context

Question

In my application I have Lecturers and they have list of Courses they can teach and when I\'m deleting a course I want to remove connection to lecturers. Here\'s the code:

Answer 1

This can also happen when you pass a Func to Where() as a way to write a dynamic condition like here here For some reason the delegate can't be translated to SQL.