C# - Allow Implicit Narrowing Conversion In For Each With Option Strict On?

VB.Net just showing its true colors again? When I turn Option Strict On, I am still able to do implicit narrowing conversions in a for each loop.For example, this code actually compiles;

Private Sub foobar()
Dim foo() As foo = {New foo}
For Each bar As bar In foo[code].....

From my understanding of Option Strict, this should not work.See here "Restricts implicit data type conversions to only widening conversions".My code above is a narrowing conversion, and so should be illegal.It will fail at runtime with an InvalidCastException.
C# does the same thing. Below is another implicit narrowing conversion.

private void foobar()
{
foo[] foo={new foo()};[code]......