MySql.Data.MySqlClient.MySqlDataReader.GetChars C# (CSharp) Method

    public override long GetChars(int i, long fieldoffset, char[] buffer, int bufferoffset, int length)
    {
      if (i >= FieldCount)
        Throw(new IndexOutOfRangeException());

      string valAsString = GetString(i);

      if (buffer == null) return valAsString.Length;

      if (bufferoffset >= buffer.Length || bufferoffset < 0)
        Throw(new IndexOutOfRangeException("Buffer index must be a valid index in buffer"));
      if (buffer.Length < (bufferoffset + length))
        Throw(new ArgumentException("Buffer is not large enough to hold the requested data"));
      if (fieldoffset < 0 || fieldoffset >= valAsString.Length)
        Throw(new IndexOutOfRangeException("Field offset must be a valid index in the field"));

      if (valAsString.Length < length)
        length = valAsString.Length;
      valAsString.CopyTo((int)fieldoffset, buffer, bufferoffset, length);
      return length;
    }