/// 
为从具有 
       指定的 URI 的资源下载的数据打开一个可读的流。
    /// 
     
      一个 
      ，用于从资源读取数据。
         /// 以 
      形式指定的 URI，将从中下载数据。    public Stream OpenRead(string address)    {      if (address == null)        throw new ArgumentNullException(nameof (address));      return this.OpenRead(this.GetUri(address));    }    /// 
为从具有 
       指定的 URI 的资源下载的数据打开一个可读的流
    /// 
     
      一个 
      ，用于从资源读取数据。
         /// 以 
      形式指定的 URI，将从中下载数据。    public Stream OpenRead(Uri address)    {      if (Logging.On)        Logging.Enter(Logging.Web, (object) this, nameof (OpenRead), (object) address);      if (address == (Uri) null)        throw new ArgumentNullException(nameof (address));      WebRequest request = (WebRequest) null;      this.ClearWebClientState();      try      {        request = this.m_WebRequest = this.GetWebRequest(this.GetUri(address));        Stream responseStream = (this.m_WebResponse = this.GetWebResponse(request)).GetResponseStream();        if (Logging.On)          Logging.Exit(Logging.Web, (object) this, nameof (OpenRead), (object) responseStream);        return responseStream;      }      catch (Exception ex)      {        Exception innerException = ex;        if (innerException is ThreadAbortException || innerException is StackOverflowException || innerException is OutOfMemoryException)        {          throw;        }        else        {          if (!(innerException is WebException) && !(innerException is SecurityException))            innerException = (Exception) new WebException(SR.GetString("net_webclient"), innerException);          WebClient.AbortRequest(request);          throw innerException;        }      }      finally      {        this.CompleteWebClientState();      }    }

public class DefaultWebServiceClient    {        Type _type;        MethodInfo _method;        object _obj;        public object InvokeService(object[] args)        {            object proxy = GetProxy();            return _method.Invoke(proxy, args);        }        public void SetValue(string fieldName, object value)        {            object proxy = GetProxy();            PropertyInfo field = _type.GetProperty(fieldName);            if (field != null)                field.SetValue(proxy, value);        }        public object GetProxy()        {            if (_obj == null)                _obj = Activator.CreateInstance(_type);            return _obj;        }        public MethodInfo MethodInfo        {            get { return _method; }        }        public DefaultWebServiceClient(Stream wsdl, string url, string methodname, string providerName)        {            if (wsdl == null || (wsdl.CanWrite && wsdl.Length == 0))                throw new Exception("Wsdl为空");            try            {                ServiceDescription sd = ServiceDescription.Read(wsdl);                ServiceDescriptionImporter sdi = new ServiceDescriptionImporter();                sdi.AddServiceDescription(sd, "", "");                CodeNamespace cn = new CodeNamespace(string.Format("DefaultWebServiceClient_{0}_{1}", providerName, wsdl.GetHashCode().ToString()));                DiscoveryClientProtocol dcp = new DiscoveryClientProtocol();                dcp.DiscoverAny(url);                dcp.ResolveAll();                foreach (object osd in dcp.Documents.Values)                {                    if (osd is ServiceDescription) sdi.AddServiceDescription((ServiceDescription)osd, null, null); ;                    if (osd is XmlSchema) sdi.Schemas.Add((XmlSchema)osd);                }                //生成客户端代理类代码                 CodeCompileUnit ccu = new CodeCompileUnit();                ccu.Namespaces.Add(cn);                sdi.Import(cn, ccu);                CSharpCodeProvider csc = new CSharpCodeProvider();                ICodeCompiler icc = csc.CreateCompiler();                //设定编译器的参数                 CompilerParameters cplist = new CompilerParameters();                cplist.GenerateExecutable = false;                cplist.GenerateInMemory = true;                cplist.ReferencedAssemblies.Add("System.dll");                cplist.ReferencedAssemblies.Add("System.XML.dll");                cplist.ReferencedAssemblies.Add("System.Web.Services.dll");                cplist.ReferencedAssemblies.Add("System.Data.dll");                //编译代理类                 CompilerResults cr = icc.CompileAssemblyFromDom(cplist, ccu);                if (true == cr.Errors.HasErrors)                {                    System.Text.StringBuilder sb = new StringBuilder();                    foreach (CompilerError ce in cr.Errors)                    {                        sb.Append(ce.ToString());                        sb.Append(System.Environment.NewLine);                    }                    throw new Exception(sb.ToString());                }                //生成代理实例,并调用方法                 Assembly assembly = cr.CompiledAssembly;                Type type = null;                foreach (Type t in assembly.GetExportedTypes())                {                    if (t.GetCustomAttributes(typeof(System.Web.Services.WebServiceBindingAttribute), false).Count() > 0)                    {                        type = t;                        break;                    }                }                MethodInfo mi = null;                if (type == null)                {                    throw new Exception("从Wsdl中找不到可调用的类型");                }                mi = type.GetMethod(methodname);                if (mi == null)                {                    throw new Exception(string.Format("从Wsdl中找不到可调用的方法{0}.{1}", type.Name, methodname));                }                _type = type;                _method = mi;            }            catch (Exception ex)            {                throw new Exception("创建WebService客户端失败！", ex);            }        }    }