constructor do not enter a function C#

Question

i have code. the constructor should enter the GetItems function but when i place breakpoint, it simply do not stop.

what is the problem?

namespace Storehouse {
    public partial class MainForm : Form {
        public MainForm() {
            InitializeComponent();
            var a = GetItems(fILEToolStripMenuItem);

        }

        public IEnumerable<ToolStripMenuItem> GetItems(ToolStripMenuItem item) {
            foreach (ToolStripMenuItem dropDownItem in item.DropDownItems) {
                if (dropDownItem.HasDropDownItems) {
                    foreach (ToolStripMenuItem subItem in GetItems(dropDownItem)) {
                        yield return subItem;
                    }
                    yield return dropDownItem;
                }

            }

        }
}

Answer 1

When you're using yield, it means deferred execution, so you need to enumerate your variable a, like this:

var a = GetItems(fILEToolStripMenuItem).ToList();

You can also use ToArray(), whatever, you simply need to enumerate your IEnumerable.