public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();


        }

        public Control AddControl(Control c)
        {
            this.Controls.Add(c);
            return c;
        }
        public Control CreateControl()
        {
            return new Control();
        }

        private void button1_Click(object sender, EventArgs e)
        {
            var list = new List<int>() { 1,2,3,4,5 };

            var list2 = list.Select((v) => this.CreateControl());
            list2.ForEach((v) => this.AddControl(v));
            list2.ForEach((v) => Console.WriteLine(v.Parent.Name));
        }

        private void button2_Click(object sender, EventArgs e)
        {

            var list = new List<int>() { 1, 2, 3, 4, 5 };

            var list2 = list.Select((v) => this.CreateControl());
            var list3 = list2.Select((v) => this.AddControl(v));
            list3.ForEach((v) => Console.WriteLine(v.Parent.Name));
        }
        
    }
    public static class LinqExtension
    {
        public static void ForEach<T>(this IEnumerable<T> arr, Action<T> pred)
        {
            foreach (var v in arr) { pred(v); }
        }
    }