Should you report the message text of exceptions?

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If you are presenting an error condition to the user, it should probably be a user-friendly message. Exceptions contain technical details that the user should not/does not need to know.

In some situations it could be a security concern to present stacktrace information, so the user should never be shown stack traces.

If you are displaying error messages to the user, there is some point where you consciously make the decision to show a popup, or add a message to a log window. At that point you can translate any exception into a more user friendly message. Note that you might need more information than the default Exception types provide, so you can/should probably create you own Exception types that contain all the information you need to present all the data you need to the user.

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