Ported .Net Core commits:

hondacrx:
- Initial commit: Switch to .Net Core 2.0
- Fix build and removed not needed files
Fabi:
- Updated solution platforms.
- Changed folder structure.
- Change library target framework to netstandard2.0.
- Updated solution platforms again...
- Removed windows specific kernel32 function usage (Ctrl-C handler).

Source/Framework/Util/NetworkExtensions.cs

@@ -0,0 +1,38 @@
+/*
+ * Copyright (C) 2012-2017 CypherCore <http://github.com/CypherCore>
+ * 
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+using System;
+using System.Net;
+
+public static class NetworkExtensions
+{
+    public static IPAddress GetNetworkAddress(this IPAddress address, IPAddress subnetMask)
+    {
+        byte[] ipAdressBytes = address.GetAddressBytes();
+        byte[] subnetMaskBytes = subnetMask.GetAddressBytes();
+
+        if (ipAdressBytes.Length != subnetMaskBytes.Length)
+            throw new ArgumentException("Lengths of IP address and subnet mask do not match.");
+
+        byte[] broadcastAddress = new byte[ipAdressBytes.Length];
+        for (int i = 0; i < broadcastAddress.Length; i++)
+        {
+            broadcastAddress[i] = (byte)(ipAdressBytes[i] & (subnetMaskBytes[i]));
+        }
+        return new IPAddress(broadcastAddress);
+    }
+}