.net - VB.NET: impossible to use Extension method on System.Object instance

Question

Can I make an Extension method for all the subclasses of System.Object (everything)?

Example:

<Extension>
Public Function MyExtension(value As Object) As Object
    Return value
End Function

The above functions won't work for object instance:

Dim myObj1 As New Object()
Dim myObj2 = myObj1.MyExtension()

The compiler does not accept it, is the problem in my computer? :)

UPDATE
The problem seems to occur only in VB, where members of object are looked-up by reflection (late-bound).

UPDATE AFTER ANSWERED
FYI, as vb has an advantage that C# lacks that is, members of imported Modules are imported to the global scope so you can still use this functions without their wrapper:

Dim myObj2 = MyExtension(myObj1)

Answer 1

It seems like not supporting Extension methods on Object was a design decision in VB.

As a result, the only way we could prevent extension methods from completely breaking existing late bound code was to prevent them from being used on anything typed as object.

http://blogs.msdn.com/b/vbteam/archive/2007/01/24/extension-methods-and-late-binding-extension-methods-part-4.aspx