Processing comma seperated files in Asp.net

aspx:

<asp:GridView ID="GridView1" runat="server">
        </asp:GridView>
        <asp:GridView ID="GridView2" runat="server">
        </asp:GridView>

Code Behind:
Page Load:

protected void Page_Load(object sender, EventArgs e)
        {
            string hdata = string.Empty;

            string ddata = string.Empty;
            string inputString;
            string rcvpath = ConfigurationManager.AppSettings["recv"].ToString();
            string archpath = ConfigurationManager.AppSettings["arch"].ToString();
            string writepath = ConfigurationManager.AppSettings["write"].ToString();
         
            DirectoryInfo dir = new DirectoryInfo(rcvpath);
            if (!dir.Exists)  Response.Write("No Directory Exists");
            else if (dir.GetFiles().Count() <= 0) Response.Write("No file Exists in the current directory");
            else
            {
                foreach (FileInfo flInfo in dir.GetFiles())
                {
                    ProcessData(flInfo,rcvpath,archpath,writepath);
                }
            }
        }

Process Data Methods:

private void ProcessData(FileInfo flInfo, string rcvpath, string archpath, string writepath)
        {
            string myfile = flInfo.Name;
            ReadData(flInfo, rcvpath);
            MoveToArchive(flInfo, rcvpath,archpath);
            WriteToFile(writepath);
            BindToGrid();
        }

Binding to grid:

private void BindToGrid()
        {
            GridView1.DataSource = listhobj;
            GridView1.DataBind();
            GridView2.DataSource = listdObj;
            GridView2.DataBind();
        }

Read Data:

 private void ReadData(FileInfo flInfo, string rcvpath)
        {
            Response.Write(flInfo.Name);
            string myfile = flInfo.Name;
            string inputString;
            
            using (StreamReader streamReader = File.OpenText(rcvpath + " \\" + myfile))
            {
                inputString = streamReader.ReadLine();

                while ((inputString != null))
                {
                    if (inputString.Contains("#header"))
                    {
                        HeaderData objhdata = new HeaderData();
                        string[] row = inputString.Split(',');
                        objhdata.columnA = row[1];

                        listhobj.Add(objhdata);

                    }

                    if (inputString.Contains("#data"))
                    {
                        Details objdata = new Details();
                        string[] row = inputString.Split(',');
                        objdata.Column1 = row[1];
                        objdata.Column2 = row[2];
                        objdata.Column3 = row[3];
                        listdObj.Add(objdata);
                    }
                    inputString = streamReader.ReadLine();
                }
            }
        }

Move to Archieve:

 private void MoveToArchive(FileInfo flInfo, string rcvpath,string archpath)
        {
            File.Move(rcvpath + "\\" + flInfo.Name, archpath + "\\" + flInfo.Name);
        }

Write Files:

 private void WriteToFile(string writepath)
        {
            string hdata = string.Empty;

            string ddata = string.Empty;
            
            foreach (HeaderData h in listhobj)
            {
                hdata += h.columnA + Environment.NewLine + " *** " + Environment.NewLine;

            }
            foreach (Details d in listdObj)
            {
                ddata += d.Column1 + d.Column2 + d.Column3 + Environment.NewLine + " **** " + Environment.NewLine;
            }
            File.WriteAllText(writepath + "\\HeaderFile.txt", hdata);
            File.WriteAllText(writepath + "\\DetailsFile.txt", ddata);
            
        }

appsetting in web.config:

 <appSettings>
        <add key="recv" value="D:\ProcessFiles\Recieve\"/>
        <add key="arch" value="D:\ProcessFiles\Archieve"/>
        <add key="write" value="D:\ProcessFiles\WriteFiles"/>
    </appSettings>