Re: Selecting Proper Variables

From: Herfried K. Wagner [MVP] (hirf-spam-me-here_at_gmx.at)
Date: 08/29/04 

Date: 29 Aug 2004 15:57:53 +0200

* "Cor Ligthert" <notfirstname@planet.nl> scripsit:
>>> MyString.empty
>>> myString = Nothing
>>> myString = ""
>>> Are all the same
>>
>> They are not the same, 'Nothing' is a null reference, 'Empty', or '""'
>> are not.
>>
> did I write Is Nothing?
> Although = Nothing acts the same as Is nothing when there is no reference.

\\\
Dim s1 As String = String.Empty
MsgBox(s1.Length) ' 0.
Dim s2 As String = Nothing
MsgBox(s2.Length) ' 'NullReferenceException'.
///

That's what I was talking about. If you compare a string that is
holding a null reference to 'String.Empty', you will receive a 'True' as
the result of the comparison. Nevertheless, both string variables
behave differently. 

-- 
 M S   Herfried K. Wagner
M V P  <URL:http://dotnet.mvps.org/>
 V B   <URL:http://dotnet.mvps.org/dotnet/faqs/>

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