asp.net error handling encapsulation

/*----------------------------------------------------------------

* Copyright (C)

* All rights reserved.

*

* FileName: ErrorManager.cs

* Function Description: asp.net in the common error repair, with this class matching need to add an error message display page, such as Error.aspx

*

* Use instructions: 1. Start the timer (timed emptying error message) in Application_Start (): ErrorManager.Instance.Start (),

* The default 12-hour run time, or with ErrorManager.Instance.SetTimerInterval () set.

* 2. In Application_Error (), when an error occurs, save the error message and go to error.aspx to display the error

* String key = ErrorManager.Instance.AddError ();

* Response.Redirect ("error.aspx?key=" + key);

* 3. In Error.aspx, the key is passed through the URL to obtain and display an error message:

* String err = ErrorManager.Instance.GetError (key)

* The first 19 characters in Err are the time when the error occurred, followed by the error message.

* 4. In order to catch a session timeout error, instead of returning Session[key] is a null error message, this class adds GetSession ()

* and the Setsession function to unify the management session, in the future ASPX cannot read the session directly, but must read through this class.

*

*

* Create identity:

*

* Modify the identity:

* Modify Description:

*

* Modify the identity:

* Modify Description:

*----------------------------------------------------------------*/