Ends the ChartControlBase's initialization.
Calling the ChartControlBase.BeginInit method prevents any validation from being performed until the EndInit method is called. This may lead to unexpected results in the case of any initialization errors.
If ChartControlBase.BeginInit was previously called, the base implementation will raise the Initialized event. Otherwise, if ChartControlBase.BeginInit was not called or it could not be determined whether BeginInit was called, Initialized is not raised and an exception is thrown instead.