Asp.net rate limiting

using System.Threading.RateLimiting;

var builder = WebApplication.CreateBuilder(args);

builder.Services.AddControllers();

builder.Services.AddRateLimiter(options =>
{
    options.RejectionStatusCode = StatusCodes.Status429TooManyRequests;
    options.AddPolicy("fixed", httpContext => RateLimitPartition.GetFixedWindowLimiter(
        partitionKey: httpContext.Connection.RemoteIpAddress?.ToString(),
        factory: partition => new FixedWindowRateLimiterOptions
        {
            PermitLimit = 1,
            Window = TimeSpan.FromSeconds(10)
        }));
});

var app = builder.Build();

app.UseRateLimiter();
app.UseRouting();
app.UseEndpoints(endpoints =>
{
    endpoints.MapControllers();
});

app.Run();