System.IO.StringWriter.FlushAsync C# (CSharp) Method

        public override Task FlushAsync()
        {
            return Task.CompletedTask;
        }
        

        public static async Task FlushAsyncWorks()
        {
            StringBuilder sb = getSb();
            StringWriter sw = new StringWriter(sb);

            sw.Write(sb.ToString());

            await sw.FlushAsync(); // I think this is a noop in this case

            Assert.Equal(sb.ToString(), sw.GetStringBuilder().ToString());
        }