将自定义标头/cookie添加到错误请求(400) ASP.Net核心

using Microsoft.AspNetCore.Builder;
using Microsoft.AspNetCore.Http;
using System.Threading.Tasks;

public class CustomMiddleware
{
    private readonly RequestDelegate _next;

    public CustomMiddleware(RequestDelegate next)
    {
        _next = next;
    }

    public async Task Invoke(HttpContext context)
    {
        await _next(context);

        if (context.Response.StatusCode == 400)
        {
            context.Response.Headers.Add("CustomHeader", "CustomValue");

            context.Response.Cookies.Append("CustomCookie", "CustomValue");
        }
    }
}

public static class CustomMiddlewareExtensions
{
    public static IApplicationBuilder UseCustomMiddleware(this IApplicationBuilder builder)
    {
        return builder.UseMiddleware<CustomMiddleware>();
    }
}

public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
{
    // ...

    app.UseCustomMiddleware();

    // ...
}