ObjectHeaderState.cs

public class ObjectHeaderState : ParserState
{
    private Regex _regex;
    private int _objectTypeIndex;
    private int _objectIdIndex;

    public ObjectHeaderState(Parser parser) 
        : base(parser)
    {
        InitRegex();
    }

    private void InitRegex()
    {
        // regex used to pull out object type and id
    }

    public override void ReadLine(string line)
    {
        var match = _regex.Match(line);
        if (match.Success)
        {
            // add object to dependency graph if it
            // is on the list of imported objects
        }
        // If we hit OBJECT-PROPERTIES move to next
        // state (object properties), otherwise, just ignore
        // this line.
        else if (line.IndexOf("object-properties", StringComparison.OrdinalIgnoreCase) >= 0)
        {
            Parser.SetState(Parser.ObjectPropertiesState);
        }
    }
}