상속: DbContext
 static void TestCase_WhereClauseWithReadOnlyProperty(SchoolContext context)
 {
     Console.WriteLine("Test case: Where clause with read-only property");
     foreach (var student in context.Students.Where(s => s.DisplayName.Contains("a") || s.DisplayName2.Contains("b")))
     {
         Console.WriteLine($"\t{student.FirstMidName} {student.LastName} enrolled on {student.EnrollmentDate}");
     }
 }
 static void TestCase_ProjectionWithReadOnlyProperty(SchoolContext context)
 {
     Console.WriteLine("Test case: Projection with read-only property");
     foreach (var student in context.Students.Select(s => new { Name = s.DisplayName, s.DisplayName2, s.EnrollmentDate }))
     {
         Console.WriteLine($"\t{student.Name} enrolled on {student.EnrollmentDate}");
     }
 }
 static void TestCase_ProjectionWithUnsupportedMethod(SchoolContext context)
 {
     Console.WriteLine("Test case: Projection with unsupported method");
     foreach (var student in context.Students.Select(s => new { s.FirstMidName, s.LastName, EnrolDate = s.EnrollmentDate.GetHashCode() }))
     {
         Console.WriteLine($"\t{student.FirstMidName} {student.LastName} enrolled on {student.EnrolDate}");
     }
 }
 static void TestCase_WhereClauseWithUnsupportedMethod(SchoolContext context)
 {
     Console.WriteLine("Test case: Where clause with unsupported method");
     System.Linq.Expressions.Expression<Func<Student, bool>> predicate = s => StringContains(s.FirstMidName, "A");
     foreach (var student in context.Students.Where(predicate))
     {
         Console.WriteLine($"\t{student.FirstMidName} {student.LastName} enrolled on {student.EnrollmentDate}");
     }
 }
        static void Main(string[] args)
        {
            using (var context = new SchoolContext())
            {
                Console.WriteLine($"Checking if we have students: {context.Students.Count()} students found");

                Console.WriteLine("Running test cases");

                TestCase_ProjectionWithReadOnlyProperty(context);
                TestCase_ProjectionWithUnsupportedMethod(context);
                TestCase_WhereClauseWithReadOnlyProperty(context);
                TestCase_WhereClauseWithUnsupportedMethod(context);

                Console.WriteLine("Press any key to continue");
                Console.Read();
            }
        }