use System.ComponentModel

class Test

	var _visited as bool

	def main is shared
		Test().run
		
	def run
		assert not _visited
		using c = Component()
			listen c.disposed, ref .componentDisposed
		assert _visited
		
		_visited = false
		using c = Component()
			listen c.disposed, ref _componentDisposed
		assert _visited

	def componentDisposed(sender as Object, args as EventArgs)
		_visited = true

	def _componentDisposed(sender as Object, args as EventArgs)
		_visited = true