Generating CSV file using dotnet

using System.Xml;
using System.IO;
using System.Web.Script.Serialization;

 private void CreateANDSaveCSV()
    {
        #region CreateANDSaveCSV
        string strHeaders = "FirstName,LastName,Gender";
        string strData = "Test First Name,Test Last Name,Test Gender";
        string strFinalData = strHeaders + Environment.NewLine + strData;
        File.WriteAllText(Server.MapPath(".\\FolderName\\CSV\\" + "FileName_" + Session["USER"].ToString() + ".csv"), strFinalData);
        #endregion
    }