It's common practice to define two Equals() methods: one that overrides .Equals(Object) from the base class and one that performs a direct comparison to the actual type, avoiding unnecessary type checks (and unnecessary boxing if it's a value type!)

But I haven't found a way of doing that in F#, at least without getting some warnings.
Not even the lifesaver OverloadID attribute helps in this case:

[<Struct>]
[<StructuralEquality(false)>]
[<StructuralComparison(false)>]
type Complex(real:float, imag:float) =
member x.Real = real
member x.Imag = imag
override x.Equals(o:Object) =
match o with
| :? Complex as c -> c.Real = real && c.Imag = imag
| _ -> false
[<OverloadID("fastequals")>]
member x.Equals(c:Complex) = c.Real = real && c.Imag = imag

I keep getting the same warning over and over again, pointing to the definition of the second method:

This new member hides the abstract member 'Object.Equals(obj obj) : bool'

Can I simply ignore the warning? IMHO the warning makes no sense because there's already a definition for Object.Equals lines above.
Any help will be appreciated! thanks!