IIS Custom HTTP Error Messages Error code Error message 400 Cannot resolve the request. 401.1 Unauthorized: Access is denied due to invalid credentials. 401.2 Unauthorized: Access is denied due to server configuration favoring an alternate authentication method. 401.3 Unauthorized: Access is denied due to an ACL set on the requested resource. 401.4 Unauthorized: Authorization failed by a filter installed on the Web server. 401.5 Unauthorized: Authorization failed by an ISAPI/CGI application. 401.7 ......

The following picture shows the work process of IIS 6.0:

PRIMARY KEY NONCLUSTERED Author : Pankaj Tahiliani Technology : SQL SERVER Problem : How to ADD NON CLUSTERED PRIMARY KEY ON TABLE COLUMN Solution : ALTER TABLE [tablename] ADD CONSTRAINT [PK_columnName] PRIMARY KEY NONCLUSTERED ([column]) ON [PRIMARY] ......

The GridView 'dgList' fired event RowDeleting which wasn't handled. Author : Pankaj Tahiliani Technology : ASP.NET Error : The GridView 'dgList' fired event RowDeleting which wasn't handled. Solution : There is no way to turn off this error message. The only solution of this error is to create the dgList_RowDeleting event on the code behind file and do nothing inside it ......

Below image will show you the IIS request process. I found it somewhere on the net.