Add lifetime hosted service to detect fully started ASP.NET Core

ElectronNET.API/LifetimeServiceHost.cs

@@ -0,0 +1,41 @@
+using System;
+using System.Threading;
+using System.Threading.Tasks;
+using Microsoft.Extensions.Hosting;
+
+namespace ElectronNET.API
+{
+    /// <summary>
+    /// Base class that reports if ASP.NET Core has fully started.
+    /// </summary>
+    internal class LifetimeServiceHost : IHostedService
+    {
+        public LifetimeServiceHost(IHostApplicationLifetime lifetime)
+        {
+            lifetime.ApplicationStarted.Register(() =>
+            {
+                App.Instance.IsReady = true;
+
+                Console.WriteLine("ASP.NET Core host has fully started.");
+            });
+        }
+
+        /// <summary>
+        /// Triggered when the application host is ready to start the service.
+        /// </summary>
+        /// <param name="cancellationToken">Indicates that the start process has been aborted.</param>
+        public Task StartAsync(CancellationToken cancellationToken)
+        {
+            return Task.CompletedTask;
+        }
+
+        /// <summary>
+        /// Triggered when the application host is performing a graceful shutdown.
+        /// </summary>
+        /// <param name="cancellationToken">Indicates that the shutdown process should no longer be graceful.</param>
+        public Task StopAsync(CancellationToken cancellationToken)
+        {
+            return Task.CompletedTask;
+        }
+    }
+}