下面代码等效:
If (cbl Is Nothing) Then
Else
dosomething()
End If
If Not (cbl Is Nothing) Then
dosomething()
End IfIf (cbl IsNot Nothing) Then
dosomething()
End If
下面代码等效:
If (cbl Is Nothing) Then
Else
dosomething()
End If
If Not (cbl Is Nothing) Then
dosomething()
End IfIf (cbl IsNot Nothing) Then
dosomething()
End If

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