how to write the validation for the checkboxlistfor in MVC

Question

tr>

<td><b>Course</b></td>

<td>

@Html.HiddenFor(m => m.Id)

@{var test = Model;

}

@Html.CheckBoxListFor(m => m.courseMappingList.CourseIds,

m => m.CourseList,

m => m.CourseId,

m => m.CourseName,

m => m.selectCheckCourseList)

@Html.ValidationMessageFor(m => m.courseMappingList)

</td>

</tr>