How to enable detailed error information for IIS and ASP.NET

By default, IIS and ASP.NET hide detailed error information to prevent revealing sensitive information about your web application:
IIS generic error

ASP.NET generic error

Sometimes you need to see error details (think shared hosting). Add these entries to your web.config file to disable generic errors:

    <customErrors mode="Off" />

    <httpErrors errorMode="Detailed" />


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