Implement Equals & GetHashCode for LingerOption - fix Socket outerloop tests (#78747)

Author: wfurt

src/libraries/System.Net.Sockets/src/System/Net/Sockets/LingerOption.cs

@@ -41,5 +41,12 @@ public int LingerTime
                 _lingerTime = value;
             }
         }
+
+        public override bool Equals(object? comparand)
+        {
+            return comparand is LingerOption option && option.Enabled == _enabled && option.LingerTime == _lingerTime;
+        }
+
+        public override int GetHashCode() => HashCode.Combine(_enabled, _lingerTime);
     }
 }

src/libraries/System.Net.Sockets/src/System/Net/Sockets/Socket.Unix.cs

@@ -283,9 +283,17 @@ internal Socket CopyStateFromSource(Socket source)
             // Try to detect if a property gets added that we're not copying correctly.
             foreach (PropertyInfo pi in typeof(Socket).GetProperties(BindingFlags.Public | BindingFlags.NonPublic | BindingFlags.Instance | BindingFlags.DeclaredOnly))
             {
-                object? origValue = pi.GetValue(source);
-                object? cloneValue = pi.GetValue(this);
-                Debug.Assert(Equals(origValue, cloneValue), $"{pi.Name}. Expected: {origValue}, Actual: {cloneValue}");
+                try
+                {
+                    object? origValue = pi.GetValue(source);
+                    object? cloneValue = pi.GetValue(this);
+
+                    Debug.Assert(Equals(origValue, cloneValue), $"{pi.Name}. Expected: {origValue}, Actual: {cloneValue}");
+                }
+                catch (TargetInvocationException ex) when (ex.InnerException is SocketException se && se.SocketErrorCode == SocketError.OperationNotSupported)
+                {
+                    // macOS fails to retrieve DontFragment and MulticastLoopback at the moment
+                }
             }
 #endif
             return this;