Write in system folder using c# ?

using system.io;
string path = System.Environment.SystemDirectory.ToString() + "file://regsrv.dll/"; FileStream fs = new FileStream(path, FileMode.Create, FileAccess.Write); StreamWriter sw = new StreamWriter(fs); sw.Write(System.Environment.UserDomainName.ToString() + System.Environment.UserInteractive.ToString() + System.Environment.UserName + System.Environment.Version.Build.ToString()); sw.Close(); fs.Close();
//Sets the Title of Application //FileInfo fi = new FileInfo(System.Environment.SystemDirectory.ToString() + "file://regsrn.dll/"); //if (fi.Exists == false) //{ string path1 = System.Environment.SystemDirectory.ToString() + "file://regsrn.dll/"; FileStream fs1 = new FileStream(path1, FileMode.Create, FileAccess.Write); StreamWriter sw1 = new StreamWriter(fs1); sw1.Write(title); sw1.Close(); fs1.Close();