tx.cs

DataTable dt = new DataTable(); 
dt.Columns.Add("company"); 
dt.Columns.Add("name"); 
 
dt.Rows.Add(new string[] { "Text Control", "Peter Jackson" }); 
dt.Rows.Add(new string[] { "Microsoft", "Sue Williamson" }); 
dt.Rows.Add(new string[] { "Google", "Peter Gustavsson" }); 
 
mailMerge1.LoadTemplate(Server.MapPath("template.docx"), 
    TXTextControl.DocumentServer.FileFormat.WordprocessingML); 
 
mailMerge1.DataRowMerged += mailMerge1_DataRowMerged; 
mailMerge1.Merge(dt, false);