private List <string> ConvertToColumnValues(CourseSubjectModel cs)
        {
            List <string> colValues = new List <string>();

            try
            {
                colValues.Add(cs.SubjectId.ToString());
                colValues.Add(cs.CourseId.ToString());
            }
            catch (Exception)
            {
                throw;
            }

            return(colValues);
        }
        private static CourseSubjectModel ConvertToCourseSubject(Dictionary <string, string> fieldValues)
        {
            CourseSubjectModel cs = new CourseSubjectModel();

            foreach (KeyValuePair <string, string> row in fieldValues)
            {
                switch (row.Key)
                {
                case "id":
                    try
                    {
                        cs.CourseSubjectId = int.Parse(row.Value);
                    }
                    catch (Exception)
                    {
                        throw;
                    }
                    break;

                case "SubjectId":
                    try
                    {
                        cs.SubjectId = int.Parse(row.Value);
                    }
                    catch (Exception)
                    {
                        throw;
                    }
                    break;

                case "CourseId":
                    try
                    {
                        cs.CourseId = int.Parse(row.Value);
                    }
                    catch (Exception)
                    {
                        throw;
                    }
                    break;

                default:
                    break;
                }
            }
            return(cs);
        }