Provides information about custom error messages for an ASP.NET application.

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

Attributes and Elements:

defaultRedirect :

The URL can be absolute or relative. A relative URL, such as /ErrorPage.htm, is relative to the Web.config file that specified the URL for this attribute, not to the Web page in which the error occurred. A URL starting with a tilde (~), such as ~/ErrorPage.htm, indicates that the specified URL is relative to the root path of the application.

mode :

• On : Specifies that custom errors are enabled. If no defaultRedirect attribute is specified, users see a generic error. The custom errors are shown to the remote clients and to the local host.
• Off : Specifies that custom errors are disabled. The detailed ASP.NET errors are shown to the remote clients and to the local host.
• RemoteOnly : Specifies that custom errors are shown only to the remote clients, and that ASP.NET errors are shown to the local host. This is the default value.
  

<configuration>
<system.web>
<customErrors defaultRedirect="GenericError.htm"
mode="RemoteOnly">
<error statusCode="500"
redirect="InternalError.htm"/>
</customErrors>
</system.web>
</configuration>