static IEnumerable <Tree <Type> .TreeNode> GetNodes(Type T)
{
Type[] Interfaces = T.GetInterfaces();
Type[] Types = Interfaces.Except(Interfaces.SelectMany(Typ => Typ.GetInterfaces())).ToArray();
for (int i = 0; i < Types.Length; i++)
{
Tree <Type> .TreeNode N = new Tree <Type> .TreeNode(GetNodes(Types[i]));
N.Userdata = Types[i];
yield return(N);
}
}