Convert bytes to appropriate size Kb, Mb, Gb, Tb

        public string ToFileSize(double value)

        {

            string[] suffixes = { "bytes", "KB", "MB", "GB",

        "TB", "PB", "EB", "ZB", "YB"};

            for (int i = 0; i < suffixes.Length; i++)

            {

                if (value <= (Math.Pow(1024, i + 1)))

                {

                    return ThreeNonZeroDigits(value /

                        Math.Pow(1024, i)) +

                        " " + suffixes[i];

                }

            }

             return ThreeNonZeroDigits(value /

                Math.Pow(1024, suffixes.Length - 1)) +

                " " + suffixes[suffixes.Length - 1];

        }

        private string ThreeNonZeroDigits(double value)

        {

            if (value >= 100)

            {

                // No digits after the decimal.

                return value.ToString("0,0");

            }

            else if (value >= 10)

            {

                // One digit after the decimal.

                return value.ToString("0.0");

            }

            else

            {

                // Two digits after the decimal.

                return value.ToString("0.00");

            }

        }