问安全大会声明什么也不做？

EN

 [assembly: UIPermission(SecurityAction.RequestOptional,Unrestricted = true)]
[assembly: FileIOPermission(SecurityAction.RequestOptional, Read = @"C:\Hello.txt")]
class Program
{
    static void Main(string[] args)
    {
        // Create a file
        TextWriter tw = new StreamWriter(@"C:\Hello.txt");
        tw.WriteLine("Hello, world!");
        tw.Close();

        // Display the text of the file
        TextReader tr = new StreamReader(@"C:\Hello.txt");
        Console.WriteLine(tr.ReadToEnd());
        tr.Close();

        Console.ReadLine();
    }
}