The ASP.NET developer can find information about custom error messages for an ASP.NET application by setting customErrors OFF from the web.config file.

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<customErrors defaultRedirect=”url”
              mode=”On|Off|RemoteOnly”>
     <error. . ./>
</customErrors>

Setting the customErrors mode=”Off ” means that custom errors are disabled. The detailed ASP.NET errors are shown to the remote clients and to the local host.