在.Net 4.0中点火并忘记

Question

我浏览了堆栈溢出等文章和链接但是如何在.Net 4.0中实现fire and forget概念？任何人都可以详细解释一下。

通过使用Fire和Forget概念来表现，即;页面加载所花费的时间最小化了吗？enter code here

using System;
using System.Collections.Generic;
using System.Linq;
using System.Net.Http;
using System.Text;
using System.Threading.Tasks;
using System.Web;
using System.Configuration;

namespace AJGSourceIPModuleNet4
{
    public class HttpModule4 : IHttpModule
    {
        public void Dispose()
        {
        }

        public void Init(HttpApplication app)
        {
            app.AddOnBeginRequestAsync(OnBegin, OnEnd);
        }

        private IAsyncResult OnBegin(object sender, EventArgs e, AsyncCallback cb, object extraData)
        {
            var tcs = new TaskCompletionSource<object>(extraData);
            DoAsyncWork(HttpContext.Current).ContinueWith(t =>
            {
                if (t.IsFaulted)
                {
                    tcs.SetException(t.Exception.InnerExceptions);
                }
                else
                {
                    tcs.SetResult(null);
                }
                if (cb != null) cb(tcs.Task);
            });
            return tcs.Task;
        }

        private void OnEnd(IAsyncResult ar)
        {

        }

        private async Task DoAsyncWork(HttpContext ctx)
        {

            var client = new HttpClient();
            var result = await client.GetStringAsync("http://foo.com");

            // use result
int result = await FireAndForgetInternal();

        }

        private Task<int> FireAndForgetInternal()
        {
            return System.Threading.Tasks.TaskEx.Run(() =>
             {
                 TaskEx.Delay(10000);
                 return 42;  // meaning of life
             }); 
        }
    }

这是使用FireAndForget的正确方法吗？我不想等待结果。请指导。

由于