C#

ACROIEHELPERLib.AcroIEHlprObjClass acroIEHlpr = new ACROIEHELPERLib.AcroIEHlprObjClass();

[Serializable()]
  public class TestParams {


      public TestParams() {

          }

      private string m_filename;

      [EditorAttribute(typeof(FileNameEditor), typeof(UITypeEditor))]

      public string FileName {
          get { return m_filename; }
          set { m_filename = value; }
          }

      }

TestParams TP = new TestParams();
propertygrid.SelectedObject  = TP;

private void Save(TestParams obj) {

           XmlSerializer xs = new XmlSerializer(typeof(TestParams));
           using (FileStream fs = new FileStream(Directory.GetCurrentDirectory() + "\\testparams.xml", FileMode.OpenOrCreate)) {


               xs.Serialize(fs, obj);
               }
           }
       }

private void RestartAll()
{
   // These are not that important, only to transfer the same properties of the form to the new form.
   depo.multipleformlocation=this.Location;
   depo.multipleform = true;
   depo.ekrangoruntusuadedi = 0;

   this.Hide();

   mainwindow _mainwindow = new mainwindow();
   _mainwindow.ShowDialog();

   this.Close();

   // Here is my temporary solution (putting old form's thread to sleep infinitely because it shouldn't keep doing what it does)
   Thread.Sleep(Timeout.Infinite);
}