❔ Syntactical Difference In Azure Function Scripts

[Function("CreatePrivateMessage")]
            public HttpResponseData Run([HttpTrigger(AuthorizationLevel.Function, new string[]
            {
                "get",
                "post"
            })] HttpRequestData req)
            {...

    [FunctionName("CreatePrivateMessage")]
            public static async Task<IActionResult> Run(
                    [HttpTrigger(AuthorizationLevel.Function, "get", "post", Route = null)] HttpRequest req,
                    ILogger log) {...