Middle for caching exceptions on .net core web API.

ExceptionMiddleware.cs

    public class ErrorHandlingMiddleware
    {
        private readonly RequestDelegate _next;

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

        public async Task Invoke(HttpContext context)
        {
            try
            {
                await _next(context);
            }
            catch (Exception ex) when(!(ex is ValidationException))
            {
                await HandleExceptionAsync(context, ex);
            }
        }

        private static Task HandleExceptionAsync(HttpContext context, Exception exception)
        {
            HttpStatusCode code;
            switch (exception)
            {                
                case UnauthorizedAccessException _:
                case SecurityTokenException  _:
                    code = HttpStatusCode.Unauthorized;
                    break;
                case NotFoundException _:
                case KeyNotFoundException _:
                    code = HttpStatusCode.NotFound;
                    break;                
                default:
                    code = HttpStatusCode.InternalServerError;
                    break;
            }

            var result = JsonConvert.SerializeObject(new
            {
                error = exception.Message,
                name = exception.GetType().Name
            });
            context.Response.ContentType = "application/json";
            context.Response.StatusCode = (int)code;
            return context.Response.WriteAsync(result);
        }
    }