Write data into text file using c#

 public void write_date()
        {
            string fileName = @"C:\adi.txt";

            using (FileStream fs = File.Open(fileName, FileMode.Open, FileAccess.Write, FileShare.None))
            {
                Byte[] info = new UTF8Encoding(true).GetBytes("This is adi");
                fs.Write(info, 0, info.Length);
            }
        }