从程序集动态生成WinForms树视图

我几乎掌握了，但是我很难优雅地完成最后一部分。这个答案是根据Jeremy Thompson提交的答案更新的。这是我目前所看到的:

public void SetupTree()
{
    var types = Assembly.Load("Data").GetTypes().Where(t => t.IsPublic && t.IsClass);
    if (types.Count() > 0)
    {
        if (treeView_left.Nodes.Count == 0)
        {
            treeView_left.Nodes.Add(new TreeNode("Structure Data"));
            treeView_left.Nodes[0].Nodes.Add(types.First().GetHashCode().ToString(), types.First().Name);
        }
        foreach (Type type in types)
        {
            BuildTree(types, type, treeView_left.Nodes[0].Nodes[0]);
        }
    }
    treeView_left.Refresh();
}
private void BuildTree(IEnumerable<Type> types, Type type, TreeNode parentNode)
{
    var tempNodes = treeView_left.Nodes.Find(type.BaseType.GetHashCode().ToString(), true);
    if (tempNodes.Count() > 0)
    {
        parentNode = tempNodes[0];
        if (tempNodes.Count() != 1)
        {
            //TODO: warning
        }
    }
    if (parentNode != null)
    {
        if (treeView_left.Nodes.Find(type.GetHashCode().ToString(), true).Count() == 0)
        {
            parentNode.Nodes.Add(type.GetHashCode().ToString(), type.Name);
        }
        foreach (Type t in types.Where(x => x.IsSubclassOf(type)))
        {
            BuildTree(types, t, parentNode.Nodes[type.GetHashCode().ToString()]);
        }
    }
}

这会产生我正在寻找的结果，但我怀疑我正在做一些这方面的困难。如果有人能指出最后一部分更简洁的方法，我将不胜感激。

public void SetupTree()
{
    Assembly dataLib = Assembly.Load("Data");
    TreeNode theTree = new TreeNode("Assembly Data");
    foreach (Type type in dataLib.GetTypes())
    {
        LoadAllChildren(dataLib, type, theTree);
    }
    treeView_left.Nodes.Add(theTree);  //Optimisation - bind all nodes in one go rather than adding individually
}
private void LoadAllChildren(Assembly dataLib,Type type, TreeNode parentNode)
{
    if (type.IsPublic && type.IsClass)
    {            
        TreeNode node = new TreeNode(type.Name);
        parentNode.Nodes.Add(node);           
        var types = dataLib.GetTypes().Where(x => x.IsSubclassOf(type));
        foreach (Type t in types)
        {
            LoadAllChildren(dataLib, t, node);
        }
    }
}