.NET / Web Config | Custom Errors

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Mais um retirado do baú:

Quanto há um erro no site é gerado um evento de erro nos custom errors do webconfig.

Nesta altura podem acontecer duas situações:
- Custom Errors "Off": O Erro gerado é mostrado na própria página

- Custom Errors "On": Aparece uma mensagem a avisar que os custom errors estão activados. Neste caso, é possível p.ex., criar um html ou aspx "Erro.aspx" com texto genérico de erro e mostrando um link para uma página anterior, etc.

Neste último caso, é necessário adicionar a página criada ao webconfig, na zona de costum errors:
<customErrors mode="On" defaultRedirect="Erro.aspx">

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