# System.Net.Sockets

``` diff
 namespace System.Net.Sockets {
     public sealed class SafeSocketHandle : SafeHandleMinusOneIsInvalid {
+        public override bool IsInvalid { get; }
     }
     public sealed class UnixDomainSocketEndPoint : EndPoint {
+        public override AddressFamily AddressFamily { get; }
+        public override EndPoint Create(SocketAddress socketAddress);
+        public override SocketAddress Serialize();
+        public override string ToString();
     }
 }
```

