Update C# bindings to 1.4.0 API

src/bindings/csharp/NetworkInfo.cs

@@ -0,0 +1,67 @@
+/*
+ * Copyright (c)2013-2021 ZeroTier, Inc.
+ *
+ * Use of this software is governed by the Business Source License included
+ * in the LICENSE.TXT file in the project's root directory.
+ *
+ * Change Date: 2026-01-01
+ *
+ * On the date above, in accordance with the Business Source License, use
+ * of this software will be governed by version 2.0 of the Apache License.
+ */
+/****/
+
+using System.Net;
+using System.Collections.Concurrent;
+using System.Collections.Generic;
+
+using ZeroTier;
+
+namespace ZeroTier.Core
+{
+    public class NetworkInfo {
+        public ulong Id { get; set; }
+        public ulong MACAddress;
+        public string Name;
+        public int Status;
+        public int Type;
+        public uint MTU;
+        public int DHCP;
+        public bool Bridge;
+        public bool BroadcastEnabled;
+        internal bool transportReady;   // Synthetic value
+
+        public bool IsPrivate
+        {
+            get {
+                return Type == Constants.NETWORK_TYPE_PRIVATE;
+            }
+        }
+
+        public bool IsPublic
+        {
+            get {
+                return Type == Constants.NETWORK_TYPE_PUBLIC;
+            }
+        }
+
+        internal ConcurrentDictionary<string, IPAddress> _addrs = new ConcurrentDictionary<string, IPAddress>();
+
+        public ICollection<IPAddress> Addresses
+        {
+            get {
+                return _addrs.Values;
+            }
+        }
+
+        internal ConcurrentDictionary<string, ZeroTier.Core.RouteInfo> _routes =
+            new ConcurrentDictionary<string, ZeroTier.Core.RouteInfo>();
+
+        public ICollection<ZeroTier.Core.RouteInfo> Routes
+        {
+            get {
+                return _routes.Values;
+            }
+        }
+    }
+}