I have used below code to create html from doc file ,But result HTML having charset=windows-1252 like <Content-Type content="text/html; charset=windows-1252"> I want it UTF-8 .Can anyone help

object FileName = fileName;
                object utf8 = Encoding.UTF8;
                wrdDoc = wrdApp.Documents.Open(ref FileName, ref oMissing,
                 ref oMissing, ref oMissing, ref oMissing, ref oMissing, ref oMissing,
                 ref oMissing, ref oMissing, ref oMissing, ref oMissing, ref oMissing,
                 ref oMissing, ref oMissing, ref oMissing, ref oMissing);
                wrdDoc.Activate();
              
                wrdDoc.SaveAs2(ref fileNameProcessed, ref fileFormat, ref missing, ref missing, ref missing, ref missing,
                    ref missing, ref missing, ref missing, ref missing, ref missing, ref missing, ref utf8,
                    ref missing, ref missing, ref missing, ref missing);
                object saveChanges = WdSaveOptions.wdDoNotSaveChanges;