//parm Header - it will write text with H1 tag in doc
//parm  WholeData -  it is the data which you want to write in doc file after writing header or title. 
private void CreateDocFiles( string header,string WholeData)
        {
            try
            {
                //Create an instance for word app  
                Microsoft.Office.Interop.Word.Application winword = new Microsoft.Office.Interop.Word.Application();

                //Set animation status for word application  
                winword.ShowAnimation = false;

                //Set status for word application is to be visible or not.  
                winword.Visible = false;

                //Create a missing variable for missing value  
                object missing = System.Reflection.Missing.Value;

                //Create a new document  
                Microsoft.Office.Interop.Word.Document document = winword.Documents.Add(ref missing, ref missing, ref missing, ref missing);

  s                //Add paragraph with Heading 1 style  
                Microsoft.Office.Interop.Word.Paragraph para1 = document.Content.Paragraphs.Add(ref missing);
                object styleHeading1 = "Heading 1";
                para1.Range.set_Style(ref styleHeading1);
                para1.Range.Text = header;       // "Para 1  header text";
                para1.Range.InsertParagraphAfter();

                //document.Content.Text =  Environment.NewLine + Environment.NewLine; // add new lines after writing header 

                //Add paragraph with Heading 2 style  
                Microsoft.Office.Interop.Word.Paragraph para2 = document.Content.Paragraphs.Add(ref missing);         

                para2.Range.Font.Size = 14;
                para2.Range.Text = WholeData;  // writing body of doc file 
                para2.Range.InsertParagraphAfter();

                //Create a 1X1 table and insert some dummy record  
                Table firstTable = document.Tables.Add(para1.Range, 2, 1, ref missing, ref missing);
                firstTable.Borders.Enable = 1;
                foreach (Row row in firstTable.Rows)
                {
                    foreach (Cell cell in row.Cells)
                    {
                        //Header row  
                        if (cell.RowIndex == 1)
                        {
                            cell.Range.Text = "CodeConfig.in Sample Code" + cell.ColumnIndex.ToString();
                            cell.Range.Font.Bold = 1;
                            //other format properties goes here  
                            cell.Range.Font.Name = "verdana";
                            cell.Range.Font.Size = 10;
                            //cell.Range.Font.ColorIndex = WdColorIndex.wdGray25;                              
                            cell.Shading.BackgroundPatternColor = WdColor.wdColorGray25;
                            //Center alignment for the Header cells  
                            cell.VerticalAlignment = WdCellVerticalAlignment.wdCellAlignVerticalCenter;
                            cell.Range.ParagraphFormat.Alignment = WdParagraphAlignment.wdAlignParagraphCenter;

                        }
                        //Data row  
                        else
                        {
                            //cell.Range.Text = (cell.RowIndex - 2 + cell.ColumnIndex).ToString();
                            cell.Range.Text = "SQL or C# code sample will appear here";
                        }
                    }
                }

                //Save the document  
                //removing special chars which are not supported in file name  
                header = header.Replace(",", " ").Replace("-", " ").Replace("\\", " ").Replace("/", " ").Replace(":", " ").Replace("*", " ").Replace("?", " ").Replace("\"", " ").Replace("<", " ").Replace(">", " ").Replace("|", " ");
                object filename = OutPutPath + "\\" + header + ".docx";
                document.SaveAs2(ref filename);
                document.Close(ref missing, ref missing, ref missing);
                document = null;
                winword.Quit(ref missing, ref missing, ref missing);
                winword = null;
                //MessageBox.Show("Document created successfully !");
            }
            catch (Exception ex)
            {
                string errormsg = ex.Message;
              
            }
        }