[VB.NET]if(CheckBox1 != null && CheckBox2 != null ) 转换为VB.net的代码应该是什么？

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if(CheckBox1 != null && CheckBox2 != null ) 转换为VB.net的代码应该是什么？
if(CheckBox1 != null && CheckBox2 != null ) 转换为VB.net的代码应该是什么？
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if not checkbox1 is nothing and checkbox2 is nothing then
^
end if
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if checkbox1 is nothing and checkbox2 is nothing then
^
end if
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下面的正确，准备结体：

If (Not CheckBox1 Is Nothing) And (Not CheckBox2 Is Nothing) Then
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If( ( CheckBox1 IsNot Nothing) And (CheckBox2 IsNot Nothing) ) Then
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