private void FillName() { if (NameBuilder == null) { return; } var documentName = string.Format("Счет № {0} от {1}", Account.Number, Account.Date.ToShortDateString()); NameBuilder.DocumentName = documentName; NameBuilder.Build(); var nameParagraph = NameBuilder.GetResult(); _mainDocumentPart.Document.Body.AppendChild(nameParagraph); }