The encode() method HTML encodes characters, which is the correct XSS prevention method in this context.

So if a " character was inserted inside of $str to try and break out of the HTML attribute context, this would be converted to &amp;quot; or &amp;#34; which is the HTML representation.

Therefore it is not possible to inject script here, assuming encode does not have any flaws itself that allows this to happen.

How can I bypass double quotes in a attribute based xss attack
I faced the error mentioned in the title when doing my homework, and simply can't find a way to remove it. Here is the method that I have this problem with:

public static double LaskeMiidi(double[] luvut)
{
    double ka = Keskiarvo(luvut);
    double miidi = luvut[0];

    for (int i = 0; i &lt; luvut.Length; i++)
    {
        if (luvut[i] - ka &lt; luvut[i + 1] - ka) // The line error points to!
        {
            miidi = luvut[i];
        }
        else
        {
            miidi = luvut[i + 1];
        }
    }
    return miidi;
}


So basically the problem is that when I say luvut[i + 1], at some point this index might become more than the length of the array is. I just can't figure out any ways to solve this problem, since I'm only a beginner with programming.
