TcpClient Constructor (String, Int32)

This constructor creates a new TcpClient and makes a synchronous connection attempt to the provided host name and port number. The underlying service provider will assign the most appropriate local IP address and port number. TcpClient will block until it either connects or fails. This constructor allows you to initialize, resolve the DNS host name, and connect in one convenient step.

If IPv6 is enabled and the TcpClient(String, Int32) method is called to connect to a host that resolves to both IPv6 and IPv4 addresses, the connection to the IPv6 address will be attempted first before the IPv4 address. This may have the effect of delaying the time to establish the connection if the host is not listening on the IPv6 address.

Note
If you receive a SocketException, use SocketException.ErrorCode to obtain the specific error code. After you have obtained this code, you can refer to the Windows Sockets version 2 API error code documentation in MSDN for a detailed description of the error.

Note
This member outputs trace information when you enable network tracing in your application. For more information, see Network Tracing.

The following code example demonstrates how to create an instance of the TcpClient class using a host name and port number.

//Creates a TCPClient using host name and port.
TcpClient tcpClientB = new TcpClient ("www.contoso.com", 11000);

.NET Framework

.NET Framework Client Profile

Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

Reference