// This method gets called by the runtime. Use this method to add services to the container.

        public void ConfigureServices(IServiceCollection services)

        {

            services.AddMvc().SetCompatibilityVersion(CompatibilityVersion.Version_2_1);

            services.AddApiVersioning(o =>

            {

                o.ReportApiVersions = true;

                o.AssumeDefaultVersionWhenUnspecified = true;

                o.DefaultApiVersion = new ApiVersion(, );

                //o.ApiVersionReader = new HeaderApiVersionReader("x-api-version");

            });

        }

    //版本1控制器

    [ApiVersion("1.0", Deprecated = true)]

    [Route("api/values")]

    [ApiController]

    public class ValuesV1Controller : ControllerBase

    {

        [HttpGet]

        public IEnumerable<string> Get()

        {

            return new string[] { "这是版本1.0返回的——数据1", "这是版本1.0返回的——数据2" };

        }

    }

    //版本2控制器

    [ApiVersion("2.0")]

    [Route("api/values")]

    [ApiController]

    public class ValuesV2Controller : ControllerBase

    {

        [HttpGet]

        public IEnumerable<string> Get()

        {

            return new string[] { "这是版本2.0返回的——数据1", "这是版本2.0返回的——数据2" };

        }

    }