using (var context = new SchoolEntities()){ foreach (var department in context.Departments) { foreach (var course in department.Courses) { Console.WriteLine("{0}: {1}", department.Name, course.Title); } }}

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using (var context = new SchoolEntities()){ foreach (var department in context.Departments.Include("Courses")) { foreach (var course in department.Courses) { Console.WriteLine("{0}: {1}", department.Name, course.Title); } }}