.net – 在Object的构造函数中使用扩展方法,其中“Me”是ByRef目

Public Module Extensions
    <Extension()> _
    Public Sub Initialize(ByRef Target as SomeClass,ByVal SomeParam as Something )
        ...
        Target  = SomethingElse
    end Sub
End Module

Class SomeClass
...

    sub New(ByVal SomeParam as Something )
       Me.Initialize(SomeParam)
    end sub

    sub New()

    end sub

End Class


'Case 1: Doesnt Work...why????:

    Dim foo as new SomeClass(SomeParam) 'foo remains uninitialized


'Case 2: Does Work:
    Dim foo as new SomeClass()
    foo.Initialize(SomeParam) 'foo is initialized

题：
为什么Case 1无法按预期初始化对象？