public void Process()
{
    foreach (string line in file)
    {
        if (!ProcessLine(line))
        {
            return;
        }
    }
}
 
private bool ProcessLine(string line)
{
    string[] columns = line.split(',');
    foreach (string column in columns)
    {
        if (!ProcessColumn(column))
        {
            return false;
        }
    }
    return true;
}
 
private bool ProcessColumn(string column)
{
    if (hasBadData(column))
    {
        LogErrorMessage();
        return false;
    }
 
    Print(column);
    return true;
}