Unhandled Exception: System.NullReferenceException: A null value was found where an object instance was required.
  at System.Timers.Timer.StartTimer () [0x00000]
  at (wrapper delegate-invoke) System.MulticastDelegate:invoke_void ()

Unhandled Exception: System.NullReferenceException: A null value was found where an object instance was required.
  at System.Timers.Timer.StartTimer () [0x00000]
  at (wrapper delegate-invoke) System.MulticastDelegate:invoke_void ()

Unhandled Exception: System.NullReferenceException: A null value was found where an object instance was required.
  at System.Timers.Timer.StartTimer () [0x00000]
  at (wrapper delegate-invoke) System.MulticastDelegate:invoke_void ()

Unhandled Exception: System.NullReferenceException: A null value was found where an object instance was required.
  at System.Timers.Timer.StartTimer () [0x00000]
  at (wrapper delegate-invoke) System.MulticastDelegate:invoke_void ()

Unhandled Exception: System.NullReferenceException: A null value was found where an object instance was required.
  at System.Timers.Timer.StartTimer () [0x00000]
  at (wrapper delegate-invoke) System.MulticastDelegate:invoke_void ()

Unhandled Exception: System.NullReferenceException: A null value was found where an object instance was required.
  at System.Timers.Timer.StartTimer () [0x00000]
  at (wrapper delegate-invoke) System.MulticastDelegate:invoke_void ()