c# - "is" operator compile-time warning -


from reference:

the keyword causes compile-time warning if expression known true.

i tried create example:

class myclass {     public void method(myclass c)     {         if (c myclass)         {             //...         }          if (c object)         {             //...         }     } }

but don't warnings. why?

can show me example warning (because expression true)?

it works false.

the is operator return false if value null, if call method(null) not enter either if-block.

however, if myclass struct (i.e. not nullable), produce warning.


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