Dynamically attaching/detaching events

[James Blibo]

This is more a windows questions than ggc question. I am dynamically attaching and detaching eventhandlers using += and -=.
However, the the event is already attached, a object null ref exception is thrown. How do I check is the event is attached or detached before add or removing it.

[Administrator]

Hi James,

Thank you for being patience.

Please refer to the following link has lot of useful articles about discusses deeply about the delegates
http://search.msdn.microsoft.com/search/default.aspx?siteId=0&tab=0&query=.Net+Delegates

Also please update us the call stack on the exception, it would help us to debug your issue at the earliest.

Kindly let us know if you need any further assistance.
Have a nice day.

Best regards,
Madhan