ADBaseLibrary.AdobeHDS.FragmentProcessor.CloseFile C# (CSharp) Method

        public async Task CloseFile()
        {
            byte tp = (byte)(hasVideo ? 4 : 0);
            tp |= (byte)(hasAudio ? 1 : 0);
            byte[] data=new byte[1];
            data[0] = tp;
            writeStream.Seek(4, SeekOrigin.Begin);
            await writeStream.WriteAsync(data, 0, 1);
            writeStream.Close();
        } 
        private int ThreadCount = 0;