теперь точно готово

ProjectSession/ProjectSession/Entities/ExamGradeBook.cs

@@ -6,7 +6,7 @@ namespace ProjectSession.Entities
     {
         public int Id { get; private set; }
 
-        public int ExamId { get; private set; }
+        public int StudentID { get; private set; }
 
         public int Mark { get; private set; }
 
@@ -15,7 +15,7 @@ namespace ProjectSession.Entities
             return new ExamGradeBook
             {
                 Id = id,
-                ExamId = examId,
+                StudentID = examId,
                 Mark = mark
             
             };