The 2 most common HTTP errors that occur are the 404 and 403. 404 is the File Not Found error and it is generated when the user clicks on a broken link or enters a file or folder name that does not exist in the server. And the 403 Access Denied error is generated when the user tries to access a page he/she has no permissions to. These errors can be handled by IIS or the ASP.NET website, here I will show the latter.

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