c# - Should placeholder text be used for EventArgs properties if the value is not available? -

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let's had event messagetransferfailed. event takes eventargs argument specifies local ip , remote ip.

now let's assume message transfer failed because corresponding tcpclient disposed , result, can no longer access client.localendpoint , client.remoteendpoint.

now have (?) specify sort of placeholder ips event args event invocation because cannot access them tcpclient. guideline placeholder text use in circumstance?

should both properties (localip , remoteip) contain empty strings? sort sort of meaningful message "unknown"? sentence indicating error occurred clients can understand happened?

what best practice in situation?

set localip , remoteip null , add new property specify whether or not result succeeded


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