https://learn.microsoft.com/en-us/dotnet/api/system.web.httpserverutility?view=netframework-4.8.1&redirectedfrom=MSDN
HttpServerUtility Class (System.Web) | Microsoft Learn
Provides helper methods for processing Web requests.
class systemwebmicrosoftlearn
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HttpServerUtility.GetLastError Method (System.Web) | Microsoft Learn
Returns the previous exception.
system webmethodmicrosoftlearn