Web API配置文件c#中出错

// 错误示例：未正确注入IConfiguration
var wrongValue = Configuration["MissingKey"]; // 返回null

// 正确做法（ASP.NET Core）：
// Program.cs中确保构建配置：
var builder = WebApplication.CreateBuilder(args);
var configValue = builder.Configuration["Key"];

// 或通过依赖注入：
services.Configure<MyOptions>(Configuration.GetSection("MySection"));

// 错误：控制器方法路由重叠
[Route("api/[controller]")]
public class TestController : Controller {
    [HttpGet("action")] // 与下面冲突
    public string Get() => "A";
    
    [HttpGet("action")] 
    public string Get2() => "B"; // 运行时报AmbiguousMatchException
}

// 解决方案：确保路由唯一性
[HttpGet("action1")]
[HttpGet("action2")]

// Startup.cs/Program.cs中错误配置：
app.UseCors(); // 未指定策略

// 正确配置：
builder.Services.AddCors(options => {
    options.AddPolicy("AllowAll", policy => 
        policy.AllowAnyOrigin().AllowAnyMethod());
});
app.UseCors("AllowAll");

// 返回DateTime格式异常
services.AddControllers().AddJsonOptions(options => {
    options.JsonSerializerOptions.DateTimeHandling = 
        JsonDateTimeHandling.ISO8601; // .NET 6+
});

// 错误：未注册服务直接使用
builder.Services.AddScoped<IMyService, MyService>(); // 遗漏此句会导致运行时异常

builder.Services.AddAuthentication(JwtBearerDefaults.AuthenticationScheme)
    .AddJwtBearer(options => {
        options.TokenValidationParameters = new TokenValidationParameters {
            ValidateIssuer = true,
            ValidIssuer = builder.Configuration["Jwt:Issuer"],
            ValidateAudience = true,
            ValidAudience = builder.Configuration["Jwt:Audience"],
            ValidateLifetime = true,
            IssuerSigningKey = new SymmetricSecurityKey(
                Encoding.UTF8.GetBytes(builder.Configuration["Jwt:Key"]))
        };
    });