C# enum gotcha!

If you define an enum with the Flags attribute, you expect that when you do an "&" operation with an enum value, you will get back the enum value you are "&" with, only if it contains within the value.

Wrong!

If you have a enum value with its numeric value set to "0", and you do:

value & zeroValue == zeroValue

You will always get zeroValue back, even if the actual enum value never had the zero value specified!!

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