public void VConcat(CSVData other)
{
if (Object.ReferenceEquals(other, this))
{
other = new CSVData(other);
}
if (Cols.SequenceEqual(other.Cols))
{
AddRows(other._rows);
}
else
{
string message = String.Format("VConcat: cannot be done with CSV data with different columns");
throw new ArgumentOutOfRangeException(nameof(other), message);
}
}