Add project files.

OemanTrader.WPF/App.xaml.cs

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+using Microsoft.Extensions.DependencyInjection;
+using OemanTrader.FinantialModelingPrepAPI.Services;
+using OemanTrader.WPF.ViewModels;
+using System;
+using System.Collections.Generic;
+using System.Configuration;
+using System.Data;
+using System.Linq;
+using System.Threading.Tasks;
+using System.Windows;
+
+namespace OemanTrader.WPF
+{
+    /// <summary>
+    /// Interaction logic for App.xaml
+    /// </summary>
+    public partial class App : Application
+    {
+        protected override void OnStartup(StartupEventArgs e)
+        {
+            //new MajorIndexService().GetMajorIndex(Domain.Models.MajorIndexType.DowJones).ContinueWith((t) =>
+            //{
+            //    var index = t.Result;
+            //});   
+
+            Window window = new MainWindow();
+            window.DataContext = new MainViewModel();
+            window.Show();
+
+            base.OnStartup(e);
+        }
+        
+        private IServiceProvider CreateServiceProvider()
+        {
+            // 1. Singelton - one instance per application
+            // 2. Transient - different instance everytime
+            // 3. Scoped - one instance per "scope"
+
+            IServiceCollection services = new ServiceCollection();
+            return services.BuildServiceProvider();
+
+        }
+    }
+}