Append content at the end of file

Question

Hi,

I am using stream stream writer to write the contents in following way.

  using (Windows.Storage.Streams.IRandomAccessStream writeStream = await file.OpenAsync(FileAccessMode.ReadWrite))
            {
                using (TextWriter TW= new StreamWriter(writeStream.AsStream()))
                {
                   
                    foreach (item in ITEMS)
                    {                        
                        item.Write(TW);
                    }
                }
            }

here i am using separate method to write the contents 'Write' and passing streamWriter to write appropriate values.

Please suggest me how can i write content to the end of file and without loosing previous data.

Thanks,

 

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C Mahone