Method extension for safely type convert

Recently I read good Russian post with many interesting extensions methods after then I remembered that I too have one good extension method “Safely type convert”. Idea of this method: int i; i = "1".To<int>(); // i == 1 i = "1a".To<int>(); // i == 0 (default value of int) i = "1a".To(10); // i == 10 (set as default value 10) i = "1".To(10); // i == 1