# System.Net.Sockets

``` diff
 namespace System.Net.Sockets {
     public class NetworkStream : Stream {
+        public void Close(TimeSpan timeout);
     }
     public class Socket : IDisposable {
+        public bool Poll(TimeSpan timeout, SelectMode mode);
+        public static void Select(IList? checkRead, IList? checkWrite, IList? checkError, TimeSpan timeout);
     }
 }
```

