System.Net.Sockets命名空间中缺少TCPListener

Question

I'm using TCPListener which according to this page should be in System.Net.Sockets, I have

using System.Net;
using System.Net.Sockets;
...
TCPListener tcpListener = new TCPListener(10);

Visual Studio is producing the following error

Error 1 The type or namespace name 'TCPListener' could not be found (are you missing a using directive or an assembly reference?) C:\\path\\WindowsService.cs 85 13 Windows Service Test1

Did I miss something?

Answer 1

You need to spell it correctly: it's TcpListener , not TCPListener . C# is case-sensitive.

Answer 2

区分大小写，即TcpListener

Answer 3

Try changing your code to

using System.Net;
using System.Net.Sockets;
...
TcpListener tcpListener = new TcpListener(10);

C# is case sensitive and the TCP section should be Tcp.

HTH

OneSHOT