/// <summary>
 /// Create a StudentCohortAssociation object
 /// </summary>
 /// <param name="cs">the service to use for this action</param>
 /// <param name="associations">the StudentCohortAssociation to create</param>
 /// <returns>result of this action</returns>
 public static async Task<ActionResponseResult> CreateOneStudentCohortAssociation(CohortService cs, string cId, string sId)
 {
     var a = new StudentCohortAssociation { cohortId = cId, studentId = sId, beginDate = DateTime.Now };
     var result = await cs.CreateStudentCohortAssociation(a);
     var student = (StudentDisplayObject)HttpContext.Current.Cache[sId];
     return GlobalHelper.GetActionResponseResult(sId, student != null ? student.name : "", result, HttpStatusCode.Created);
 }
 /// <summary>
 /// Delete a StudentCohortAssociation object
 /// </summary>
 /// <param name="cs">service to use for this action</param>
 /// <param name="association">the StudentCohortAssociation to delete</param>
 /// <returns>result of this action</returns>
 public static async Task<ActionResponseResult> DeleteOneStudentCohortAssociation(CohortService cs, StudentCohortAssociation association)
 {
     var response = await cs.DeleteStudentCohortAssociationById(association.id);
     var student = (StudentDisplayObject)HttpContext.Current.Cache[association.studentId];
     return GlobalHelper.GetActionResponseResult(association.studentId, student != null ? student.name : "", response, HttpStatusCode.NoContent);
 }