MSDN Documentation

System.Net Namespace

Provides classes that allow you to send or receive data from Internet resources.

HttpClient

The HttpClient class provides a base class for sending HTTP requests. It is recommended for most client-side scenarios, offering better performance and resource management than older classes like WebClient.

Common Methods:

• GetAsync(string requestUri)

  Sends a GET request to the specified Uri.

  Returns:

  A Task<HttpResponseMessage> representing the asynchronous operation.

• PostAsync(string requestUri, HttpContent content)

  Sends a POST request to the specified Uri.

  requestUri

  The Uri to send the request to.

  content

  An HttpContent object that contains the HTTP request body.

  Returns:

  A Task<HttpResponseMessage> representing the asynchronous operation.

See full documentation for HttpClient...

HttpListener

Use the HttpListener class to create a listener that listens for incoming HTTP requests. This is useful for building simple web servers or APIs.

Common Methods:

• Start()

  Starts listening for incoming HTTP requests.

• Stop()

  Stops listening for incoming HTTP requests.

• GetContext()

  Waits for an incoming request and returns an HttpListenerContext object representing the request.

  Returns:

  An HttpListenerContext object.

See full documentation for HttpListener...

WebClient

WebClient provides a simple way to download or upload data. It's often used for basic file transfers or fetching simple web content.

Common Methods:

• DownloadString(string address)

  Downloads a string resource from the specified URI.

  address

  The Uri of the resource to download.

  Returns:

  A string containing the resource.

• UploadString(string address, string data)

  Uploads a string to the specified URI.

  address

  The Uri to upload the string to.

  data

  The string to upload.

See full documentation for WebClient...

IPAddress

The IPAddress class represents an Internet Protocol (IP) address and is fundamental for network communication.

Common Properties:

• AddressFamily

  Gets the address family of the IP address (e.g., IPv4 or IPv6).

• IsIPv4MappedToIPv6

  Gets a value indicating whether the IP address is an IPv4-mapped IPv6 address.

Common Methods:

• Parse(string ipString)

  Converts the string representation of an IP address to an IPAddress instance.

  ipString

  A string that contains an IP address.

  Returns:

  An IPAddress instance.

See full documentation for IPAddress...

Dns

The Dns class provides methods for resolving domain names to IP addresses and vice versa.

Common Methods:

• GetHostEntry(string hostNameOrAddress)

  Resolves the specified host name or IP address to an xref:System.Net.IPHostEntry instance.

  hostNameOrAddress

  The host name or IP address to resolve.

  Returns:

  An xref:System.Net.IPHostEntry instance.

• GetHostName()

  Gets the host name of the local computer.

  Returns:

  The host name of the local computer.

See full documentation for Dns...

Socket

The Socket class provides the Windows Sockets API for network communication. It offers low-level control over network operations.

Common Properties:

• SocketType

  Gets the socket type.

• ProtocolType

  Gets the protocol type.

Common Methods:

• Bind(EndPoint localEP)

  Binds a Socket to a local endpoint.

  localEP

  An xref:System.Net.EndPoint instance that represents the local endpoint to which to bind the socket.

• Connect(EndPoint remoteEP)

  Establishes a connection to a remote host.

  remoteEP

  An xref:System.Net.EndPoint instance that represents the remote device to which you intend to connect.

See full documentation for Socket...