vb.net – 为什么不需要再指示ByVal/ByRef？

Public Sub (Something As WhateverClass) 
  Something = New WhateverClass 'will result in no changes when outside this method

  Something.Property1 = "Test"  'will result in an updated property when outside this method
End Sub

从MSDN：

The value of a reference type is a pointer to the data elsewhere in memory. This means that when you pass a reference type by value,the procedure code has a pointer to the underlying element’s data,even though it cannot access the underlying element itself. For example,if the element is an array variable,the procedure code does not have access to the variable itself,but it can access the array members.