Update C# bindings to 1.4.0 API

src/bindings/csharp/NodeInfo.cs

@@ -0,0 +1,46 @@
+/*
+ * 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 ZeroTier;
+
+namespace ZeroTier.Core
+{
+    /* Convenience structures for exposing lower level operational details to the user.
+    These structures do not have the same memory layout or content as those found in
+    include/ZeroTierSockets.h */
+
+    /// <summary>
+    /// Structure containing information about the local Node.
+    /// </summary>
+    public class NodeInfo {
+        // Node ID
+        public ulong Id { get; set; }
+
+        /**
+         * The port used by the service to send and receive
+         * all encapsulated traffic
+         */
+        public ushort PrimaryPort { get; set; }
+        public ushort SecondaryPort { get; set; }
+        public ushort TertiaryPort { get; set; }
+
+        /**
+         * ZT version
+         */
+        public byte VersionMajor { get; set; }
+        public byte VersionMinor { get; set; }
+        public byte VersionRev { get; set; }
+    }
+}