This is a subclass of WebRequest. .NET uses this subclass to request documents from the http and https URI schemes (RFCs 2616 and 2818, respectively). An instance of this type is returned by WebRequest.Create( ) when a URI starting with the http:// or https:// prefix is passed in. Since that method's return value is WebRequest, cast it to HttpWebRequest if you need access to any of the methods or properties that are unique to this class (and the HTTP or HTTPS protocol).

The properties on this type correspond directly to the headers documented in the RFC standard documentation; see that document for details regarding their contents. Note that because these headers are sent as part of the HTTP request, any modification of the headers must be done before the request is sent to the remote host. (Calling either GetResponse( ) or BeginGetResponse( ), the asynchronous version of GetResponse( ), sends the request.)

When a WebRequest encounters an error, a WebException is thrown.

public class HttpWebRequest : WebRequest {
// Protected Constructors
   protected HttpWebRequest(System.Runtime.Serialization.SerializationInfo serializationInfo,
       System.Runtime.Serialization.StreamingContext streamingContext);
// Public Static Properties
   public static int DefaultMaximumResponseHeadersLength{set; get; }
// Public Instance Properties
   public string Accept{set; get; }
   public Uri Address{get; }
   public bool AllowAutoRedirect{set; get; }
   public bool AllowWriteStreamBuffering{set; get; }
   public X509CertificateCollection ClientCertificates{get; }
   public string Connection{set; get; }
   public override string ConnectionGroupName{set; get; }
//overrides WebRequest
   public override long ContentLength{set; get; }     
// overrides WebRequest
   public override string ContentType{set; get; }     
// overrides WebRequest
   public HttpContinueDelegate ContinueDelegate{set; get; }
   public CookieContainer CookieContainer{set; get; }
   public override ICredentials Credentials{set; get; }       
// overrides WebRequest
   public string Expect{set; get; }
   public bool HaveResponse{get; }
   public override WebHeaderCollection Headers{set; get; }    
// overrides WebRequest
   public DateTime IfModifiedSince{set; get; }
   public bool KeepAlive{set; get; }
   public int MaximumAutomaticRedirections{set; get; }
   public int MaximumResponseHeadersLength{set; get; }
   public string MediaType{set; get; }
   public override string Method{set; get; }          
// overrides WebRequest
   public bool Pipelined{set; get; }
   public override bool PreAuthenticate{set; get; }   
// overrides WebRequest
   public Version ProtocolVersion{set; get; }
   public override IWebProxy Proxy{set; get; }        
// overrides WebRequest
   public int ReadWriteTimeout{set; get; }
   public string Referer{set; get; }
   public override Uri RequestUri{get; } 
// overrides WebRequest
   public bool SendChunked{set; get; }
   public ServicePoint ServicePoint{get; }
   public override int Timeout{set; get; }            
// overrides WebRequest
   public string TransferEncoding{set; get; }
   public bool UnsafeAuthenticatedConnectionSharing{set; get; }
   public string UserAgent{set; get; }
// Public Instance Methods
   public override void Abort( );         
// overrides WebRequest
   public void AddRange(int range);
   public void AddRange(int from, int to);
   public void AddRange(string rangeSpecifier, int range);
   public void AddRange(string rangeSpecifier, int from, int to);
   public override IAsyncResult BeginGetRequestStream(AsyncCallback callback, object state)
// overrides WebRequest
   public override IAsyncResult BeginGetResponse(AsyncCallback callback, object state)
// overrides WebRequest
   public override Stream EndGetRequestStream(IAsyncResult asyncResult)
// overrides WebRequest
   public override WebResponse EndGetResponse(IAsyncResult asyncResult)
// overrides WebRequest
   public override int GetHashCode( );    
// overrides object
   public override Stream GetRequestStream( );         
// overrides WebRequest
   public override WebResponse GetResponse( );         
// overrides WebRequest
}

Hierarchy

System.Object System.MarshalByRefObject WebRequest(System.Runtime.Serialization.ISerializable) HttpWebRequest