Builder.ErrorHandling.cs

using Microsoft.AspNetCore.Diagnostics;

public static partial class ApiBuilder
{
    public static IServiceCollection AddErrorHandling(this IServiceCollection services)
    {
        services.AddExceptionHandler<ExceptionHandler>();
        services.AddProblemDetails(options =>
        {
            options.CustomizeProblemDetails = context =>
            {
                context.ProblemDetails.Instance = $"{context.HttpContext.Request.Method} {context.HttpContext.Request.Path}";
                context.ProblemDetails.Extensions.TryAdd("requestId", context.HttpContext.TraceIdentifier);
            };
        });
        return services;
    }
}

public class ExceptionHandler(IProblemDetailsService problemDetailsService) : IExceptionHandler
{
    public async ValueTask<bool> TryHandleAsync(HttpContext httpContext, Exception exception, CancellationToken cancellationToken)
    {
        var statusCode = exception switch
        {
            InvalidOperationException or ArgumentException => StatusCodes.Status422UnprocessableEntity,
            BadHttpRequestException or FormatException => StatusCodes.Status400BadRequest,
            _ => StatusCodes.Status500InternalServerError
        };

        httpContext.Response.StatusCode = statusCode;

        return await problemDetailsService.TryWriteAsync(new()
        {
            Exception = exception,
            HttpContext = httpContext,
            ProblemDetails = new()
            {
                Status = statusCode,
                Detail = exception.Message
            }
        });
    }
}