Event Code: 3005 An unhandled exception has occurred.

Event code: 3005 
Event message: An unhandled exception has occurred. 
Event time: 2/19/2009 1:41:40 PM 
Event time (UTC): 2/19/2009 6:41:40 PM 
Event ID: 83d95f94ac674e39889a37e4d558a865 
Event sequence: 2477 
Event occurrence: 300 
Event detail code: 0 
 
Application information: 
    Application domain: /LM/W3SVC/XXXXXXXXXXX/Root-1-XXXXXXXXXXX 
    Trust level: Full 
    Application Virtual Path: / 
    Application Path: C:\XXXXX\XXXXX 
    Machine name: XXXXXXXXXXX 
 
Process information: 
    Process ID: 1860 
    Process name: w3wp.exe 
    Account name: NT AUTHORITY\NETWORK SERVICE 
 
Exception information: 
    Exception type: NullReferenceException 
    Exception message: Object reference not set to an instance of an object. 
 
Request information: 
    Request URL:  
    Request path:  
    User host address:  
    User:  
    Is authenticated: False 
    Authentication Type:  
    Thread account name: domain\username 
 
Thread information: 
    Thread ID: 8 
    Thread account name: domain\username 
    Is impersonating: False 
    Stack trace:    at ASP.global_asax.Session_End(Object sender, EventArgs e)

解决方法：
If I remember correctly, I resolved this by turning off the health monitoring in dot net. You can turn it off via the web config. Of course, when you make the change, stop and start your web application. This should get them to go away...



Here is some light reading for you that explains how to use it. I haven't really found any use for it yet :)

http://aspnet.4guysfromrolla.com/articles/031407-1.aspx