Page events lifecycle simplified

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Web.UI;
using System.Web;

namespace Website.Core
{
	public static class Extensions
	{
		public static T FindControl<T>(this Control ctrl, string id)
			where T : Control {
			return FindControl<T>(ctrl, ctrl.Page, id);
		}
		public static T FindControl<T>(this Control ctrl, Control startControl, string id)
			where T : Control {
			T found = startControl.FindControl(id) as T ?? FindChildControl<T>(ctrl, startControl, id);
			return found;
		}
		public static T FindChildControl<T>(this Control ctrl, Control startControl, string id)
			where T : Control {
			T found;
			foreach (Control c in startControl.Controls) {
				found = c as T;
				if (found == null || (!String.IsNullOrEmpty(id) && (String.IsNullOrEmpty(found.ID) || !found.ID.Equals(id))))
					found = FindChildControl<T>(ctrl, c, id);
				if (found != null)
					return found;
			}
			return null;
		}
		public static T FindFirstControl<T>(this Control ctrl)
			where T : Control {
			return FindChildControl<T>(ctrl, ctrl.Page, null);
		}

		public static List<T> FindControls<T>(this Control ctrl)
			where T : Control {
			return FindControls<T>(ctrl, ctrl.Page);
		}
		public static List<T> FindControls<T>(this Control ctrl, Control startControl)
			where T : Control {
			var controls = new List<T>();
			foreach (Control c in startControl.Controls) {
				if (c is T)
					controls.Add(c as T);
				if (c.HasControls())
					controls.AddRange(FindControls<T>(ctrl, c));
			}
			return controls;
		}

		public static void Redirect301(this HttpResponse response, string url) {
			response.Clear();
			response.Status = "301 Moved Permanently";
			response.AddHeader("Location", url);
			response.End();
		}
		public static void Redirect404(this HttpResponse response) {
			response.Clear();
			HttpContext.Current.Server.Transfer("/404.aspx");
		}

		public static string GetIpAddress(this HttpRequest request) {
			return request.ServerVariables["REMOTE_ADDR"];
		}
	}
}