Int32.TryParse() returns zero on failure - success or failure?

Question

I read this from msdn about Int32.TryParse()

When this method returns, contains the 32-bit signed integer value equivalent to the num

Answer 1

TryParse() returns a Boolean.

        Int32 testInt;

        if (!Int32.TryParse("123", out testInt))
        {
            MessageBox.Show("Is not a Int32!");
            return; // abbrechen
        }

        MessageBox.Show("The parst Int32-value is " + testInt);