Extract AspNetCore dependency to VAR.WebFormsCore.AspNetCore.

* Abstract HttpContext with IWebContext.
* Move AspNetCore dependant code to isolated classes.
* Downgrade VAR.WebFormsCore to netstandard2.0.

VAR.WebFormsCore.TestWebApp/FrmDefault.cs

@@ -1,3 +1,4 @@
+using System;
 using VAR.WebFormsCore.Code;
 using VAR.WebFormsCore.Controls;
 using VAR.WebFormsCore.Pages;

VAR.WebFormsCore.TestWebApp/Program.cs

@@ -1,17 +1,12 @@
-namespace VAR.WebFormsCore.TestWebApp
-{
-    public static class Program
-    {
-        public static void Main(string[] args)
-        {
-            CreateHostBuilder(args).Build().Run();
-        }
+using VAR.WebFormsCore.AspNetCore;
 
-        private static IHostBuilder CreateHostBuilder(string[] args) =>
-            Host.CreateDefaultBuilder(args)
-                .ConfigureWebHostDefaults(webBuilder =>
-                {
-                    webBuilder.UseStartup<Startup>();
-                });
+namespace VAR.WebFormsCore.TestWebApp;
+
+public static class Program
+{
+    public static void Main(string[] args)
+    {
+        DefaultMain.WebFormCoreMain(args);
     }
-}
+
+}

VAR.WebFormsCore.TestWebApp/Startup.cs

@@ -1,22 +0,0 @@
-using Microsoft.AspNetCore.Server.Kestrel.Core;
-using VAR.WebFormsCore.Code;
-
-namespace VAR.WebFormsCore.TestWebApp
-{
-    public class Startup
-    {
-        public void ConfigureServices(IServiceCollection services)
-        {
-            // If using Kestrel:
-            services.Configure<KestrelServerOptions>(options =>
-            {
-                options.AddServerHeader = false;
-            });
-        }
-
-        public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
-        {
-            app.UseGlobalRouterMiddleware(env);
-        }
-    }
-}

VAR.WebFormsCore.TestWebApp/TestWebAppGlobalConfig.cs

@@ -1,3 +1,4 @@
+using System.Collections.Generic;
 using VAR.WebFormsCore.Code;
 
 namespace VAR.WebFormsCore.TestWebApp;
@@ -14,12 +15,12 @@ public class TestWebAppGlobalConfig : IGlobalConfig
     public List<string> AllowedExtensions { get; } = new()
         { ".png", ".jpg", ".jpeg", ".gif", ".ico", ".wav", ".mp3", ".ogg", ".mp4", ".webm", ".webp", ".mkv", ".avi" };
 
-    public bool IsUserAuthenticated(HttpContext context)
+    public bool IsUserAuthenticated(IWebContext context)
     {
         return false;
     }
 
-    public void UserDeauthenticate(HttpContext context)
+    public void UserDeauthenticate(IWebContext context)
     {
     }
 }

VAR.WebFormsCore.TestWebApp/VAR.WebFormsCore.TestWebApp.csproj

@@ -3,10 +3,10 @@
     <PropertyGroup>
         <TargetFramework>net7.0</TargetFramework>
         <Nullable>enable</Nullable>
-        <ImplicitUsings>enable</ImplicitUsings>
     </PropertyGroup>
 
     <ItemGroup>
+      <ProjectReference Include="..\VAR.WebFormsCore.AspNetCore\VAR.WebFormsCore.AspNetCore.csproj" />
       <ProjectReference Include="..\VAR.WebFormsCore\VAR.WebFormsCore.csproj" />
     </ItemGroup>