C# WebBrowse filling select with random?

Question

C++ / C#

I made it so that I would choose from select , but I need to fasten the random from 1 to 15 example.
Selection code

foreach (HtmlElement element in webBrowser1.Document.All)
                    {
                        if (element.GetAttribute("name") == "myselect")
                        {
                            element.Children[0].SetAttribute("selected", "false");
                            element.Children[1].SetAttribute("selected", "false");
element.Children[2].SetAttribute("selected", "false");
element.Children[3].SetAttribute("selected", "false");
element.Children[4].SetAttribute("selected", "false");
element.Children[0].SetAttribute("selected", "false");

                            element.Children[5].SetAttribute("selected", "true");

                        }
                    }

Answer 1

As I understand it, you are unfamiliar with cycles. Well, okay ... At the very beginning of the function, we write instruction
A inside the cycle 1 line

element.Children[r.Next(0,element.Children.Count)].SetAttribute("selected", "true");