C# Switch statement & enums

I wish i could write something like this:

void foo(MyEnum e)

{

  switch(e) complete

  {
    case MyOption1:

      bar(); break;

    case MyOption2:

      baz(); break;

  }

}

and expect compiler error is MyEnum also contains MyOption3. Of course, I can add

default: throw new Exception();

but this is not always appropriate when the code is not covered by automated tests. In my case, that’s how it is exactly. Some code similar to above is executed only on rare occasions, so there is little probability that the problem will be spotted by manual testing. And when it is in production, it would rather fail silently than throw unhandled exception.

Of course is is considered a bad practice to litter code with such switch statements everywhere, and bar() and baz() would better be virtual functions on polymorphic objects.