Model Class: CourseStudentInfo.cs

using System;
using System.ComponentModel.DataAnnotations;
using System.ComponentModel.DataAnnotations.Schema;
using SnapObjects.Data;

namespace Appeon.ApiDoc.Models.School
{
    /// <summary>
    /// This model class maps to the dbo.StudentGrade table. 
    /// It uses the primary key to generate the Where clause for the Update operation. 
    /// The SqlParameter attribute defines an argument: courseId. 
    /// The SqlWhere attribute defines the SQL Where clause using the courseId argument.
    /// 
    /// EnrollmentID is the primary key and the identity.
    /// </summary>
    [SqlParameter("courseId",typeof(int))]
    [Table("StudentGrade", Schema = "dbo")]
    [UpdateWhereStrategy(UpdateWhereStrategy.KeyColumns)]
    [SqlWhere("CourseID = :courseId")]
    public class CourseStudentInfo
    {
        [Key]
        [Identity]
        public Int32 EnrollmentID { get; set; }

        public Int32 CourseID { get; set; }

        public Int32 StudentID { get; set; }

        public Decimal? Grade { get; set; }
    }
}