** _Row is the one row of the C# DataTable **

Aspose.Words.Document _Doc = new Aspose.Words.Document(pSourceTemplatePath);
DataTable _RowDataTable = pDataSource.Clone();

_RowDataTable.Rows.Add(_Row.ItemArray);
_Doc.MailMerge.Execute(_RowDataTable);

_Doc.Save(pNewFileToSave, SaveFormat.Pdf);