.NET Разработчик. Страница 24

public class MyController : ControllerBase
{
  public ActionResult Get(MyService service) => Ok();
}

Services.Configure<ApiBehaviorOptions>(opt =>
{
  opt.DisableImplicitFromServicesParameters = true;
})

app.MapGet("/hello", () => ...)
  .WithDescription("Hello request");

app.MapGet("/hello", [EndpointSummary("Hello request")]() => ...);

// GET /tags?q=1&q=2
app.MapGet("/tags", (int[] q) => $"1:{q[0]}, 2:{q[1]}");

// GET /tags?names=john&names=jack
app.MapGet("/tags", (string[] names) => $"1:{names[0]}, 2:{names[1]}");

app.MapGet("/tags", (StringValues names) => $"1:{names[0]}, 2:{names[1]} ");

app.MapGet("/hello/{name}", HelloName)
  .AddFilter(async (сontext, next) =>
  {
    return await next(сontext);
  });

public class TryParseController : ControllerBase
{
  // GET /tryparse?data=MyName
  [HttpGet]
  public ActionResult Get([FromQuery]CustomParse data)
  {
    …
  }

  public class CustomParse
  {
    public string? Name { get; set; }

    public static bool TryParse(string s, out CustomParse result)
    {
      if (s is null) 
      {
        result = default;
        return false;
      }

      result = new CustomParse { Name = s };
      return true;
    }
  }
}

public class SealedBenchmark
{
  NonSealedType nonSealedType = new();
  SealedType sealedType = new();

  public void CallMethod_NonSealed()
   => nonSealedType.Method();

  public void CallMethod_Sealed() 
    => sealedType.Method();
}

var instance = new NonSealedType();
instance.Method();

BaseType[] value = new DerivedType[1];

class Sample
{
  public void Foo(NonSealedType obj)
  {
    _ = obj as IMyInterface;
    // ОК, т.к. производные класса 
    // могут реализовывать интерфейс
  }

  public void Foo(SealedType obj)
  {
    _ = obj is IMyInterface; 
    // ⚠️ Предупреждение CS0184

    _ = obj as IMyInterface;
    // ❌ Ошибка CS0039
  }
}