C# - string to bytearray - bytearray to string

 /// <summary>
        /// converts string to byte[]
        /// </summary>
        /// <param name="str">string (default encoding)</param>
        /// <returns>byte[] from string</returns>
        public static byte[] StringToByteArray(string str)
        {
            return StringToByteArray(str,Encoding.Default);
        }
        /// <summary>
        /// converts string to byte[]
        /// </summary>
        /// <param name="str">string</param>
        /// <param name="encoding">Encoding</param>
        /// <returns>byte[] from string</returns>
        public static byte[] StringToByteArray(string str, Encoding encoding)
        {
            return encoding.GetBytes(str);
        }
        /// <summary>
        /// converts  byte[] to string
        /// </summary>
        /// <param name="arr">byte[]</param>
        /// <returns>string from byte[] (default encoding)</returns>
        public static string ByteArrayToString(byte[] arr)
        {
            return ByteArrayToString(arr, Encoding.Default);
        }
        /// <summary>
        /// converts  byte[] to string
        /// </summary>
        /// <param name="arr">byte[]</param>
        /// <param name="encoding">Encoding</param>
        /// <returns>string from byte[]</returns>
        public static string ByteArrayToString(byte[] arr, Encoding encoding)
        {
            return encoding.GetString(arr);
        }