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c# Programming Glossary: queryflag.bydate

How can I know items is in the enum?

http://stackoverflow.com/questions/3748516/how-can-i-know-items-is-in-the-enum

add an QueryFlag of course we should use operator. flags QueryFlag.ByDate To remove one I have a different way with Dan Tao's answer ... item which doesn't exist. QueryFlag q QueryFlag.ByCustomer QueryFlag.ByDate try to remove QueryFlag.ByProduct which doesn't exist in q q.. is not in flags It seems correct when QueryFlag.ByProduct QueryFlag.ByDate .Contains QueryFlag.None false QueryFlag.ByProduct QueryFlag.ByDate..