.net core跨平台的文件路径

windows下路径为："xxxx\\yyyy"

linux路径下为："xxxx/yyyy"

用Path.Combine("xxxx","yyyy");进行合并

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通过nuget引入包 System.Runtime.InteropServices

RuntimeInformation.IsOSPlatform(OSPlatform.Linux)//判断是否为Liunx

RuntimeInformation.IsOSPlatform(OSPlatform.Windows)/判断是否为Win

RuntimeInformation.IsOSPlatform(OSPlatform.OSX)/判断是否为OS
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docker环境下用Environment.CurrentDirectory，不要用AppDomain.CurrentDomain.BaseDirectory

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Web根目录和内容根目录

    public class HomeController : Controller
    {
        private readonly IHostingEnvironment _hostingEnvironment;

        public HomeController(IHostingEnvironment hostingEnvironment)
        {
            _hostingEnvironment = hostingEnvironment;
        }

        public ActionResult Index()
        {
            string webRootPath = _hostingEnvironment.WebRootPath;
            string contentRootPath = _hostingEnvironment.ContentRootPath;

            return Content(null);
        }
    }