167.

You try to execute the following code:

try 
{
        StreamWriter sw = File.CreateText("hello.txt");
        sw.WriteLine("Hello, world!");
} 
catch (IOException ex) 
{
        Console.WriteLine(ex.Message);
} 
finally 
{
        if( sw != null ) sw.Close();
}

What is the result?

StreamWriter variable should be declared outside of the try block.