public override string ToString()
{
ScriptWriter writer = new ScriptWriter();
// write imports at the very top
HashSet <string> imports = new HashSet <string>();
CollectImports(ref imports);
foreach (string imp in imports)
{
writer.WriteFullLineFormat("using {0};", imp);
}
writer.NewLine();
Write(writer);
writer.Finish();
return(writer.ToString());
}