添加项目文件。

Atomx.WebAPI/Controllers/AreaController.cs

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+using Microsoft.AspNetCore.Http;
+using Microsoft.AspNetCore.Mvc;
+
+namespace Atomx.WebAPI.Controllers
+{
+    /// <summary>
+    /// 国家地区省份API
+    /// </summary>
+    [Route("api/[controller]")]
+    [ApiController]
+    public class AreaController : ControllerBase
+    {
+        public AreaController() { }
+
+        /// <summary>
+        /// 获取国家列表信息
+        /// </summary>
+        /// <returns></returns>
+        [HttpGet("country")]
+        public IActionResult GetCountry()
+        {
+            return new ContentResult();
+        }
+    }
+}

Atomx.WebAPI/Controllers/SignController.cs

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+using Microsoft.AspNetCore.Http;
+using Microsoft.AspNetCore.Mvc;
+
+namespace Atomx.WebAPI.Controllers
+{
+    /// <summary>
+    /// 登录注册API
+    /// </summary>
+    [Route("api/[controller]")]
+    [ApiController]
+    public class SignController : ControllerBase
+    {
+        /// <summary>
+        /// 登录
+        /// </summary>
+        /// <returns></returns>
+        [HttpPost("sign/in")]
+        public IActionResult SignIn()
+        {
+            return new ContentResult();
+        }
+
+        /// <summary>
+        /// 注册
+        /// </summary>
+        /// <returns></returns>
+        [HttpPost("sign/up")]
+        public IActionResult SignUp()
+        {
+            return new ContentResult();
+        }
+    }
+}

Atomx.WebAPI/Controllers/WeatherForecastController.cs

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+using Microsoft.AspNetCore.Mvc;
+
+namespace Atomx.WebAPI.Controllers
+{
+    [ApiController]
+    [Route("[controller]")]
+    public class WeatherForecastController : ControllerBase
+    {
+        private static readonly string[] Summaries =
+        [
+            "Freezing", "Bracing", "Chilly", "Cool", "Mild", "Warm", "Balmy", "Hot", "Sweltering", "Scorching"
+        ];
+
+        [HttpGet(Name = "GetWeatherForecast")]
+        public IEnumerable<WeatherForecast> Get()
+        {
+            return Enumerable.Range(1, 5).Select(index => new WeatherForecast
+            {
+                Date = DateOnly.FromDateTime(DateTime.Now.AddDays(index)),
+                TemperatureC = Random.Shared.Next(-20, 55),
+                Summary = Summaries[Random.Shared.Next(Summaries.Length)]
+            })
+            .ToArray();
+        }
+    }
+}