GetBytes() bug?

[leongcc]

When the string=null, GetBytes() returns a byte array with arbituary values.
When the string="", GetBytes() returns null.
Is this behaviour normal ?

The codes are test codes.

Dim  s As  String = Null
Dim  a() As  Byte
a = s.GetBytes("UTF8")

 

[Erel]

Test the value of s.
It will be "null".

When the string="", GetBytes() returns null.

It returns an empty array, not null.