Before attempting to use or change the socket connection, read Active to determine whether the connection is open and ready. For client sockets, setting Active opens or shuts down a socket connection to another machine. For server sockets, setting Active opens or shuts down a listening connection that makes the socket available for client requests. 

At design time, set Active to true to make the socket open a connection when the application starts running. At runtime, use the Open or Close method to open or close the connection. 

Close 

Open 

SetActive