I suggest you use the latest version of DevExpress (version 10.1.5 this time). It handles tables much better than previous ones.
, , (StreamReader StreamWriter Encoding.UTF8, , ):
using (RichEditControl richEditControl = new RichEditControl()) {
richEditControl.LoadDocument(Server.MapPath(@".\teste.htm"), DocumentFormat.Html);
richEditControl.SaveDocument(@"D:\teste.rtf", DocumentFormat.Rtf);
}
richEditControl.Options.Import.Html richEditControl.Options.Export.Rtf, .