implement first demo app template

ElectronNET.WebApp/Controllers/WindowsController.cs

@@ -0,0 +1,23 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Threading.Tasks;
+using Microsoft.AspNetCore.Mvc;
+using ElectronNET.API;
+
+namespace ElectronNET.WebApp.Controllers
+{
+    public class WindowsController : Controller
+    {
+        public IActionResult Index()
+        {
+            Electron.IpcMain.On("new-window", async (args) => {
+
+                await Electron.WindowManager.CreateWindowAsync();
+
+            });
+
+            return View();
+        }
+    }
+}