出于以下原因，我建议选择选项2，即ASP.NET Core Web API

I recommend option 2 i.e. ASP.NET Core Web API for following reasons

• 现在ASP.NET Core 2已经发布，它更加专注于更好的性能.您的API构建将是最少的(可以吸收应用程序中使用的内容).
可以以最有效的方式构建
• 核心Web API. .NET Core代码可以帮助您在非Windows计算机上进行部署.
• API响应足够快，因为避免了管道中的许多瓶颈.

• Now that ASP.NET Core 2 is out, it focused more on the better performance. Your API build will be minimal (takes in whats used in the application).
• Core Web API can be built in most efficient way. The .NET Core code can help you deploy on non-windows machines.
• API response is fast enough as lots of bottlenecks are avoided in the pipeline.

通过对Kestrel的改进，使用ASP.NET Core 2很有好处.WebAPI可以托管在IIS/Nginx上，也可以很容易地独立存在.

With Kestrel improvements, it beneficial to use ASP.NET Core 2. The Web API can be hosted on IIS/ Nginx or stand alone pretty easily.