/// <summary>
 /// Output a subarray copy from an index to end of array
 /// </summary>
 /// <param name="startIndex"></param>
 /// <returns></returns>
 public Hex SubBytes(int startIndex)
 {
     _bytes = Hex.SubBytes(_bytes, startIndex, _bytes.Length - startIndex);
     return(this);
 }
 /// <summary>
 /// Output a subarray copy from an index to a given length
 /// </summary>
 /// <returns></returns>
 public Hex SubBytes(int startIndex, int length)
 {
     _bytes = Hex.SubBytes(_bytes, startIndex, length);
     return(this);
 }