DopSved = ((DataRowView)BooksGrid.BindingContext[dataSet, "Books"].Current)["DopSved"];
                        fs.Write((byte[]) DopSved, 0, ((byte[])DopSved).Length);
            frmInfo.TextInfo.LoadFile(new MemoryStream((byte[])DopSved), RichTextBoxStreamType.RichText);