public void Configure(IApplicationBuilder app, IHostingEnvironment env)
{
   
    app.Run(async (context) =>
    {
        await context.Response.WriteAsync($"ApplicationName:{env.ApplicationName}");
        await context.Response.WriteAsync($"ContentRootPath:{env.ContentRootPath}");
        await context.Response.WriteAsync($"WebRootPath:{env.WebRootPath}");
        await context.Response.WriteAsync($"是否开发环境:{env.IsDevelopment()}");
    });
}

public void Configure(IApplicationBuilder app, IHostingEnvironment env, ILoggerFactory loggerFactory, IApplicationLifetime applicationLifetime)
{
    applicationLifetime.ApplicationStarted.Register(() =>
    {
        Console.WriteLine("ApplicationStarted");
    });
    applicationLifetime.ApplicationStopped.Register(() =>
    {
        Console.WriteLine("ApplicationStopped");
    });
    applicationLifetime.ApplicationStopping.Register(() =>
    {
        Console.WriteLine("ApplicationStopping");
    });
}