public void WriteStartGraph(string name, GraphOptions options)
{
if (name == null)
{
throw new ArgumentNullException(name);
}
this.checkstate(State.Begin);
this.writeline("digraph {0}", name);
this.writeline("{{");
this.writeline("");
if (options != null)
{
if (options.Overlap.HasValue)
{
this.writeline("\toverlap=\"{0}\"",options.Overlap.Value.ToString().ToLower());
}
}
this.state = State.Graph;
}
