private void FillNode(TreeNode parent, Categoria[] children)
 {
     children.ForEach(x =>
     {
         var node = new TreeNode(x.Nombre) { Tag = x };
         parent.Nodes.Add(node);
         FillNode(node, x.Children);
     });
 }
 private void FillTree(TreeView treeView, Categoria[] tree)
 {
     tree.ForEach(x =>
     {
         var node = new TreeNode(x.Nombre) { Tag = x };
         treeView.Nodes.Add(node);
         FillNode(node, x.Children);
     });
 }