Could not find schema information for element ' Appender '

The configuration information in App. Config writes Log4net, and then a bunch of message prompts appear on the error list.

Failed to find schema information for element "Appender-ref" failed to find the schema information for element "Appender" has reached the maximum number of errors or warnings

Building another log4net.config still does not solve the problem, although the result is correct, but the non-empty error list is not tolerated.

It turns out that as soon as the profile is closed, the App. Config and log4net.config that are open in the tab are closed.

Fantastic problem solved ...

Hereby share the following

Could not find schema information for element ' Appender '