private void button1_Click(object sender, EventArgs e)
  {
            string requestStr = "https://***.ccb.com/***?MERCHANTID***

            HttpWebRequest request = (HttpWebRequest)WebRequest.Create(requestStr);

            request.UserAgent = "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;)";

            HttpWebResponse response = (HttpWebResponse)request.GetResponse();
            Stream streamReceive = response.GetResponseStream();
            System.Text.Encoding encoding = System.Text.Encoding.GetEncoding("GB2312");
            StreamReader streamReader = new StreamReader(streamReceive, encoding);
            richTextBox1.Text = streamReader.ReadToEnd();
}

注意红色加粗的代码，必须有这句才行，否则返回为空

System.Diagnostics.Process.Start(System.Diagnostics.Process.GetCurrentProcess().ProcessName + ".exe");
Application.Exit();

Winform程序：
发送数据：
string path = AppDomain.CurrentDomain.BaseDirectory + "1.xml";
byte[] SomeBytes = new byte[1024];
WebRequest req = WebRequest.Create(http://localhost:6601/website/1.aspx);
req.Method = "POST";
XmlDocument xmldoc = new XmlDocument();
xmldoc.Load(path);//要发送xml的路径.   
SomeBytes = Encoding.UTF8.GetBytes(xmldoc.OuterXml);
req.ContentLength = SomeBytes.Length;
Stream newStream = req.GetRequestStream();
newStream.Write(SomeBytes, 0, SomeBytes.Length);
newStream.Close();
MessageBox.Show("发送完毕", "提示", MessageBoxButtons.OK, MessageBoxIcon.Information);

WebResponse wresp = req.GetResponse();      //接收返回数据
Stream respStream = wresp.GetResponseStream();
StreamReader reader = new StreamReader(respStream, Encoding.UTF8);
richTextBox1.Text = reader.ReadToEnd();
wresp.Close();

Web程序：
接收数据：
Stream s = HttpContext.Current.Request.InputStream;
byte[] buffer = new byte[1024];//无符号 8 位整数数组
int count = 0;
StringBuilder builder = new StringBuilder();//表示可变字符字符串。

while ((count = s.Read(buffer, 0, 1024)) > 0)//每次读取1024个字节
{
builder.Append(Encoding.UTF8.GetString(buffer, 0, count));
}
string msgReturn = builder.ToString();

msgReturn 为接收到的字符串

//发送返回数据
byte[] bytes = Encoding.GetEncoding("GB2312").GetBytes("http://www.xt80");
HttpResponse hr = HttpContext.Current.Response;
hr.Clear();
hr.OutputStream.Write(bytes, 0, bytes.Length);
hr.OutputStream.Close();

新建一个名为“app_offline.htm”的文件，放置在网站根目录下，可以使得网站自动定为至该文件显示，比如说要发布新版本的系统，可以实现放这么一个文件作为友情提示，部署完成之后删除即可，注：该文件必须大于512字节，2.0版本有效

1、新建一个WCF Service Library项目，名字叫做WCFServiceLibrary1，代码就用默认的，以下是它的两个方法：
      public string MyOperation1(string myValue)
      public string MyOperation2(DataContract1 dataContractValue)

2、在WCFServiceLibrary1项目下新建一个类文件，名字叫做MyCustomValidator.cs，编写如下代码：
      using System;
      using System.Collections.Generic;
      using System.Text;
      using System.IdentityModel.Selectors;
      using System.IdentityModel.Tokens;

      namespace WCFServiceLibrary1{
      public class MyCustomValidator:UserNamePasswordValidator{
          public override void Validate(string userName, string password)
          {
            if (!string.IsNullOrEmpty(userName) && !string.IsNullOrEmpty(password))
                if (userName != "123456" || password != "123456")
                    throw new Exception("用户名和密码错误");
                else
                    throw new Exception("用户名和密码不能为空");
          }
       }    //为了节约地方，就这么堆起了

3、新建一个WCFService项目，名字是WCFService1，引用前面已经编译好的WCFServiceLibrary1.dll，打开Service.svc
      写入以下代码：
      <% @ServiceHost Language=C# Debug="true" Service="WCFServiceLibrary1.service1" CodeBehind="" %>
      
        使用Makecert 工具创建一个证书，命令如下：
        Makecert -r -pe -n "CN=MyServer" -ss My -sky exchange

4、Web.Config做如下配置，并运行WCFService项目：
      <system.serviceModel>
    <services>
      <service behaviorConfiguration="MyBehavior" name="WCFServiceLibrary1.service1">
        <endpoint address="" binding="wsHttpBinding" bindingConfiguration="myBinding"
          contract="WCFServiceLibrary1.IService1" />
      </service>
    </services>
    <behaviors>
      <serviceBehaviors>
        <behavior name="MyBehavior">
          <serviceCredentials>
            <serviceCertificate findValue="MyServer" storeName="My" x509FindType="FindBySubjectName" />
            <userNameAuthentication userNamePasswordValidationMode="Custom"
              customUserNamePasswordValidatorType="WCFServiceLibrary1.MyCustomValidator,WCFServiceLibrary1" />
          </serviceCredentials>
          <serviceDebug httpsHelpPageEnabled="false" />
          <serviceMetadata httpGetEnabled="true" httpsGetEnabled="false" />
        </behavior>
      </serviceBehaviors>
    </behaviors>
    <bindings>
      <wsHttpBinding>
        <binding name="myBinding">
          <security>
            <message clientCredentialType="UserName" />
          </security>
        </binding>
      </wsHttpBinding>
    </bindings>
  </system.serviceModel>

6、使用svcutil.exe 工具生成客户端配置文件和代理类，使用方法：
       svcutil.exe http://localhost:4207/WCFService1/Service.svc?wsdl

7、新建一个Windows程序，叫做WindowsApplication1，首先添加如下引用：
      System.ServiceModel
      System.Runtime.Serialization

8、将前面生成的配置文件中的节点Copy到App.Config中，将代理类复制到WindowsApplication1下，在窗体上增加一个按钮，并写入下面的代码：
      private void button1_Click(object sender, EventArgs e)
        {
            Service1Client client = new Service1Client();
            client.ClientCredentials.UserName.UserName = "123456";
            client.ClientCredentials.UserName.Password = "123456";
            MessageBox.Show(client.MyOperation1("www.xt80.com"));
        }
       运行WindowsApplication1，将会看到返回信息：Hello:www.xt80.com

string poststr = "<?xml version='1.0' encoding='UTF-8'?>";
              poststr += "<MasMessage xmlns='http://www.xxx.com/interface'>";
              poststr += "  <version>1.0</version>";
              poststr += "  <TxnMsgContent>";
              poststr += "      <txnType>测试测试测试</txnType>";
              poststr += "      <cardNo>888888</cardNo>";
              poststr += "  </TxnMsgContent>";
              poststr += "</MasMessage>";
DataSet ds = new DataSet();
StringReader getsr = new StringReader(poststr );
ds.ReadXml(getsr);

以下代码是在WinForm中完成的：
第一步：先将需要Post的XML写成一个文件，这里写成test.xml，调用的时候将其中的参数修改以下就可以了，以下是一个样本：
<?xml version="1.0" encoding="utf-8"?>
<soap:Envelope xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/">
  <soap:Body>
    <GetOrderformInfo xmlns="http://samples.com/">
      <orderid>00001</orderid>
      <leaguerid>0</leaguerid>
      <prjtype>4</prjtype>
    </GetOrderformInfo>
  </soap:Body>
</soap:Envelope>

第二步：CS代码：
/// <summary>
        /// 调用WebService的方法
        /// </summary>
        /// <param name="filename">POST所用文件</param>
        /// <param name="requestURL">调用地址</param>
        /// <param name="SOAPActionURL"></param>
        /// <returns></returns>
        private string Post(string filename,string requestURL,string SOAPActionURL)
        {
            XmlDataDocument doc = new XmlDataDocument();
            doc.Load(filename);
            byte[] data = System.Text.Encoding.UTF8.GetBytes(doc.OuterXml);
            WebRequest request = WebRequest.Create(requestURL);
            request.Method = "POST";
            request.Headers.Add("SOAPAction", SOAPActionURL);
            request.Headers.Add("ContentLength", data.Length.ToString());
            request.ContentType = "text/xml; charset=utf-8";

            Stream OWrite = request.GetRequestStream();
            OWrite.Write(data, 0, data.Length);
            OWrite.Close();

            Stream oRead = null;
            HttpWebResponse response = (HttpWebResponse)request.GetResponse();
            oRead = response.GetResponseStream();
            XmlDataDocument resultdoc = new XmlDataDocument();
            resultdoc.Load(oRead);
            return resultdoc.InnerText.ToString();
        }

private void button5_Click(object sender, EventArgs e)
        {
            string filename = AppDomain.CurrentDomain.BaseDirectory + "xmlfiles/UpdatePaymentInfo.xml";
            string requestURL = "http://localhost/samples/test.asmx?op=MyTest";
            string SOAPActionURL = "http://samples.com/MyTest";
            /*这里可以增加修改XML文件参数的代码....*/
            richTextBox1.Text = Post(filename, requestURL, SOAPActionURL).Trim();   //这里调用后显示结果
        }

注：XML样本和SOAPAction地址在WebService的请求和响应示例里面有说明

1：在“服务（本地）”里有一项Eventlog和HTTP SSL都和IIS的或World Wide Web Publishing Services所以来的服务项 打开它们
2：在“服务（本地）”里中的World Wide Web Publishing Services所需要依赖的服务（Dependencies），看到是IIS Admin Service。进而发现IIS Admin Service也无法启动，再查IIS Admin Service的Dependencies，查的结果是Protected Storage和RPC（Remote Procedure Call），于是启动RPC，接着顺利启动IIS Admin Service，接着启动World Wide Web Publishing Services，于是IIS恢复正常。

注：若启动World Wide Web Publishing Services服务出现127错误（找不到指定的程序），原因是在微软补丁KB939373，卸载掉就可以了