add first api core library and implement socket.io communication

ElectronNET.API/App.cs

@@ -0,0 +1,36 @@
+using ElectronNET.API.Entities;
+using Newtonsoft.Json;
+using Newtonsoft.Json.Linq;
+using Newtonsoft.Json.Serialization;
+using Quobject.SocketIoClientDotNet.Client;
+using System;
+
+namespace ElectronNET.API
+{
+    public class App
+    {
+        private readonly Socket _socket;
+        private readonly JsonSerializer _jsonSerializer;
+
+        public App(int width, int height)
+        {
+            _jsonSerializer = new JsonSerializer()
+            {
+                ContractResolver = new CamelCasePropertyNamesContractResolver()
+            };
+
+            var socket = IO.Socket("http://localhost:3000");
+            socket.On(Socket.EVENT_CONNECT, () =>
+            {
+                Console.WriteLine("Verbunden!");
+
+                var browserWindowOptions = new BrowserWindowOptions() {
+                    Height = height,
+                    Width = width
+                };
+
+                socket.Emit("createBrowserWindow", JObject.FromObject(browserWindowOptions, _jsonSerializer));
+            });
+        }
+    }
+}

ElectronNET.API/ElectronNET.API.csproj

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+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <TargetFramework>netcoreapp1.1</TargetFramework>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="SocketIoClientDotNet" Version="1.0.3" />
+  </ItemGroup>
+
+</Project>

ElectronNET.API/Entities/BrowserWindowOptions.cs

@@ -0,0 +1,9 @@
+namespace ElectronNET.API.Entities
+{
+    public class BrowserWindowOptions
+    {
+        public int Width { get; set; }
+        public int Height { get; set; }
+        public bool Show { get; set; }
+    }
+}