IEnumerable<T>转DataTable,为空怎么办？

   public static class DataConvertor
     {
         public static DataTable ToDataTable<T>(IEnumerable<T> data)
         {
             PropertyDescriptorCollection properties = TypeDescriptor.GetProperties(typeof(T));
             var table = new DataTable();
             foreach (PropertyDescriptor prop in properties)
                 table.Columns.Add(prop.Name, Nullable.GetUnderlyingType(prop.PropertyType) ?? prop.PropertyType);
             foreach (T item in data)
             {
                 DataRow row = table.NewRow();
                 foreach (PropertyDescriptor prop in properties)
                     row[prop.Name] = prop.GetValue(item) ?? DBNull.Value;
                 table.Rows.Add(row);
             }
             return table;
         }

         public static DataTable ToDataTable(IRfcTable rfcTable)
         {
             DataTable table = new DataTable();
             int liElement = ;
             for (liElement = ; liElement <= rfcTable.ElementCount - ; liElement++)
             {
                 RfcElementMetadata metadata = rfcTable.GetElementMetadata(liElement);
                 table.Columns.Add(metadata.Name); //循环创建列
             }
             foreach (IRfcStructure dr in rfcTable) //循环table结构表
             {
                 DataRow row = table.NewRow(); //创建新行
                 for (liElement = ; liElement <= rfcTable.ElementCount - ; liElement++)
                 {
                     RfcElementMetadata metadata = rfcTable.GetElementMetadata(liElement);
                     row[metadata.Name] = dr.GetString(metadata.Name).Trim();
                 }
                 table.Rows.Add(row);
             }

             return table;
         }
     }