c# - How Many Combinations In This If Statement -

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OK - I have work with someone who wrote something like this 

  if () if () if () if ()

I do not like it !!

If there are ten different Boolean flags, then how many combinations are there?

10 factual?

I am trying to explain why it is bad

two flag Two states and 10 flags mean 2 ^ 10 = 1024


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