Await in Catch and Finally blocks

Await in Catch and Finally blocks is a part of C# 6.0

 public static async Task<string> Test()
        {
            await logMethodEntrance();
            var client = new System.Net.Http.HttpClient();
            var streamTask = client.GetStringAsync("https://localHost:1234");
            try
            {
                var responseText = await streamTask;
                return responseText;
            }
            catch (System.Net.Http.HttpRequestException e) when (e.Message.Contains("401"))
            {
                await logError("test your accessbility", e);
                return "not applicable";
            }
            finally
            {
                await logMethodExit();
                client.Dispose();
            }
        }
        private static Task logError(string v, HttpRequestException e)
        {
            throw new NotImplementedException();
        }
        private static Task logMethodExit()
        {
            throw new NotImplementedException();
        }
        private static Task logMethodEntrance()
        {
            throw new NotImplementedException();
        }