#r "netcoreapp3.1\Microsoft.AspNetCore.dll" 
#r "netcoreapp3.1\Microsoft.AspNetCore.Hosting.dll" 
#r "netcoreapp3.1\Microsoft.Extensions.DependencyInjection.dll" 
#r "netcoreapp3.1\Microsoft.Extensions.Hosting.dll"
#load "Startup.csx"

using System;
using Microsoft.AspNetCore;
using Microsoft.AspNetCore.Hosting;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Hosting;

public static IHostBuilder CreateHostBuilder(string[] args) =>
    Host.CreateDefaultBuilder(args)
        .ConfigureWebHostDefaults(webBuilder =>
        {
            webBuilder.UseStartup<Startup>();
        });

CreateHostBuilder(null).Build().Run();

#r "netcoreapp3.1\Microsoft.AspNetCore.Diagnostics.dll" 
#r "netcoreapp3.1\Microsoft.AspNetCore.Hosting.dll" 
#r "netcoreapp3.1\Microsoft.AspNetCore.Http.dll" 
#r "netcoreapp3.1\Microsoft.Extensions.DependencyInjection.dll" 
#r "netcoreapp3.1\Microsoft.Extensions.Hosting.dll" 

using Microsoft.AspNetCore.Builder;
using Microsoft.AspNetCore.Hosting;
using Microsoft.AspNetCore.Http;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Hosting;

public class Startup
{
    public void ConfigureServices(IServiceCollection services)
    {
    }

    public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
    {
        if (env.IsDevelopment())
        {
            app.UseDeveloperExceptionPage();
        }

        app.UseRouting();

        app.UseEndpoints(endpoints =>
        {
            endpoints.MapGet("/", async context =>
            {
                await context.Response.WriteAsync("Hello World!");
            });
        });
    }
}

System.BadImageFormatException: Could not load file or assembly 'Microsoft.Extensions.Hosting, Version=3.1.0.0, Culture=neutral, PublicKeyToken=adb9793829ddae60'. Reference assemblies should not be loaded for execution.  They can only be loaded in the Reflection-only loader context. (0x80131058)
File name: 'Microsoft.Extensions.Hosting, Version=3.1.0.0, Culture=neutral, PublicKeyToken=adb9793829ddae60' ---> System.BadImageFormatException: Could not load file or assembly 'Microsoft.Extensions.Hosting, Version=3.1.0.0, Culture=neutral, PublicKeyToken=adb9793829ddae60, processorArchitecture=MSIL'. Reference assemblies should not be loaded for execution.  They can only be loaded in the Reflection-only loader context. (0x80131058)
File name: 'Microsoft.Extensions.Hosting, Version=3.1.0.0, Culture=neutral, PublicKeyToken=adb9793829ddae60, processorArchitecture=MSIL' ---> System.BadImageFormatException: Cannot load a reference assembly for execution.
   at System.Runtime.Loader.AssemblyLoadContext.LoadFromPath(IntPtr ptrNativeAssemblyLoadContext, String ilPath, String niPath, ObjectHandleOnStack retAssembly)
   at System.Runtime.Loader.AssemblyLoadContext.LoadFromAssemblyPath(String assemblyPath)
   at System.Reflection.Assembly.LoadFrom(String assemblyFile)
   at System.Reflection.Assembly.LoadFromResolveHandler(Object sender, ResolveEventArgs args)
   at System.Runtime.Loader.AssemblyLoadContext.InvokeResolveEvent(ResolveEventHandler eventHandler, RuntimeAssembly assembly, String name)
   at System.Runtime.Loader.AssemblyLoadContext.OnAssemblyResolve(RuntimeAssembly assembly, String assemblyFullName)
   at Submission#0.CreateHostBuilder(String[] args)
   at Submission#0.<<Initialize>>d__0.MoveNext() in C:\temp\sample01\main.csx:line 51
--- End of stack trace from previous location ---
   at Dotnet.Script.Core.ScriptRunner.Execute[TReturn](String dllPath, IEnumerable`1 commandLineArgs) in /private/var/folders/6j/4hkjjhd50fg27s933nctz0480000gn/T/tmp3iI6tV/Dotnet.Script.Core/ScriptRunner.cs:line 52