public List <DateTimeColumnTypeDTO> GetDateTimeColumType(int columnID) { ColumnDTO result = new ColumnDTO(); using (var projectContext = new DataAccess.MyProjectEntities()) { var column = projectContext.Column.First(x => x.ID == columnID); if (column.DateTimeColumnType != null) { return(GeneralHelper.CreateListFromSingleObject <DateTimeColumnTypeDTO>(ToDateTimeColumTypeDTO(column.DateTimeColumnType))); } } return(null); }