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/Constants/Network/NetworkConst.cs

@@ -0,0 +1,35 @@
+/*
+ * 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/>.
+ */
+
+namespace Framework.Constants
+{
+    // Player state
+    public enum SessionStatus
+    {
+        Authed = 0,                                      // Player authenticated (_player == NULL, m_playerRecentlyLogout = false or will be reset before handler call, m_GUID have garbage)
+        Loggedin,                                        // Player in game (_player != NULL, m_GUID == _player->GetGUID(), inWorld())
+        Transfer,                                        // Player transferring to another map (_player != NULL, m_GUID == _player->GetGUID(), !inWorld())
+        LoggedinOrRecentlyLogout,                    // _player != NULL or _player == NULL && m_playerRecentlyLogout && m_playerLogout, m_GUID store last _player guid)
+    }
+
+    public enum PacketProcessing
+    {
+        Inplace = 0,             //process packet whenever we receive it - mostly for non-handled or non-implemented packets
+        ThreadUnsafe,            //packet is not thread-safe - process it in World.UpdateSessions()
+        ThreadSafe               //packet is thread-safe - process it in Map.Update()
+    }
+}