Return HttpResponseMessage from API in ASP.Net

Hi

I have below query & i want to create API using httpresponsemessage

                LMSDBDataContext context = new LMSDBDataContext();
                var Result = (from t in context.View_SessionDeliveryCalendarDetails_Students
                              from t2 in context.View_BookDetails
                              where (int)t.BookID == (int)t2.ID
                              && t.CurrentStatus == "Due" && t.SessionDate.Value.Date >= frDate && t.SessionDate.Value.Date <= toDate
                              && (ddlDeliveryStatus.SelectedValue != "" ? t.BookDeliveryStatus == ddlDeliveryStatus.SelectedValue : 1 == 1)
                              && t.BookID != 65 //&& t.SessionType == "Regular"
                              orderby t.Name
                              select new
                              {
                                  t.GroupName,
                                  t.SessionDate,
                                  t.BookTitle,
                                  t2.AmazonName,
                                  t2.AmazonURL,
                                  GrpName = t.SessionType == "Regular" ? t.GroupName : t.LeadNumber
                              }).ToList();

Similar to like below concept

public HttpResponseMessage GetSessionSchedule(String APIKey, DateTime FromDate, DateTime ToDate, Int32 MentorID, Int32 GroupID)
{
    BALSessionDeliveryCalendar bALSessionDeliveryCalendar = new BALSessionDeliveryCalendar();
    List<View_SessionDeliveryCalendarDetail> Result = bALSessionDeliveryCalendar.GetSessionSchedule((DateTime)FromDate, (DateTime)ToDate, MentorID, GroupID);
    return Request.CreateResponse(HttpStatusCode.OK, Result, Configuration.Formatters.JsonFormatter);
}

Thanks