Question

I have the following code in Visual Studio 2005.

    Dim OutFile As System.IO.StreamWriter     Try         OutFile = New System.IO.StreamWriter(Filename)        // Do stuff with OutFile     Catch Ex As Exception        // Handle Exception     Finally        If OutFile IsNot Nothing Then OutFile.Close()     End Try 

But VS2005 brings up the warning for the line ‘If OutFile IsNot..’ that

Variable ‘OutFile’ is used before it has been assigned a value. A null reference exception could result at runtime.

Is there some way of removing this warning by subtly altering the code or is there just a better way of doing what I’m trying to do?

Thanks

Rob

Answer 1

Dim OutFile As System.IO.StreamWriter OutFile = Nothing Try     OutFile = New System.IO.StreamWriter(Filename)    // Do stuff with OutFile Catch Ex As Exception    // Handle Exception Finally    If OutFile IsNot Nothing Then OutFile.Close() End Try 

Similar to C# error: Use of unassigned local variable