C# .NET核心Web API，抛出一个AuthorizationException，客户端得到500分。我如何让它返回401呢？

app.UseExceptionHandler(errorApp =>
{
    errorApp.Run(async context =>
    {
        var exceptionHandlerPathFeature = context.Features.Get<IExceptionHandlerPathFeature>();
        if (exceptionHandlerPathFeature?.Error is AuthorizationException)
        {
            context.Response.StatusCode = 401;
            await context.Response.WriteAsync("Unauthorized");
        }
        else
        {
            context.Response.StatusCode = 500;
            await context.Response.WriteAsync("Internal Server Error");
        }
    });
});