ASP.NET Core + C++/CLI

Main.cpp

#include "pch.h"
#include "Startup.h"

using namespace System;
using namespace Microsoft::AspNetCore;
using namespace Microsoft::AspNetCore::Hosting;
using namespace Microsoft::Extensions::Hosting;
using namespace Microsoft::Extensions::Logging;

int main(array<System::String ^> ^args)
{
	IWebHostBuilder^ builder = WebHost::CreateDefaultBuilder(args);
	builder = WebHostBuilderExtensions::UseStartup<CppSite::Startup^>(builder);
	WebHostExtensions::Run(builder->Build());

	return 0;
}

Startup.cpp

#include "pch.h"
#include "Startup.h"

namespace CppSite
{
	Startup::Startup(IConfiguration^ config) {
		this->_configuration = config;
	}

	void Startup::ConfigureServices(IServiceCollection^ services)
	{

	}

	Task^ Startup::Run(HttpContext^ context)
	{
		return HttpResponseWritingExtensions::WriteAsync(context->Response, "Hello from C++!", CancellationToken::None);
	}

	void Startup::Configure(IApplicationBuilder^ app, IHostingEnvironment^ env)
	{
		if (HostingEnvironmentExtensions::IsDevelopment(env))
		{
			DeveloperExceptionPageExtensions::UseDeveloperExceptionPage(app);
		}

		RunExtensions::Run(app, gcnew RequestDelegate(&Startup::Run));
	}
}

Startup.h

#pragma once

using namespace System;
using namespace System::Collections::Generic;
using namespace System::Threading;
using namespace System::Threading::Tasks;
using namespace System::Reflection;
using namespace Microsoft::AspNetCore::Builder;
using namespace Microsoft::AspNetCore::Hosting;
using namespace Microsoft::AspNetCore::Mvc;
using namespace Microsoft::AspNetCore::Http;
using namespace Microsoft::Extensions::Configuration;
using namespace Microsoft::Extensions::DependencyInjection;

namespace CppSite 
{
	ref class Startup
	{
	public:
		Startup(IConfiguration^ config);
		void ConfigureServices(IServiceCollection^ services);
		void Configure(IApplicationBuilder^ app, IHostingEnvironment^ env);
		static Task^ Run(HttpContext^ context);
	private:
		IConfiguration^ _configuration;
	};
}