Execute a method before app crash

gistfile1.cs

/* Set Last Action */
public App()
{
  // Global handler for uncaught exceptions.
  BugSenseHandler.Instance.Init(this, "YOUR_API_KEY");
  BugSenseHandler.SetLastBreath(MyMethod);

  // ...do more stuff...
}

private void MyMethod()
{
  //do stuff here, ex. save state etc ...
}