We're writing some code to add new pages using the API, and hit a snag when we tried to make the node alias path different from the Document Name. We found the TreeNode.NodeAliasPath property is read only but we were able to set it using TreeNode.SetValue. See the code below. Why is tn.NodeAliasPath read only? Is there any reasone we shouldn't be using tn.SetValue? Can we set this when we are creating the document or should we create the document first and then change it?

TreeProvider tree = new TreeProvider(User);
TreeNode tn = tree.SelectSingleNode(nodeID);
//tn.NodeAliasPath = newpath; // Property is read only!
tn.SetValue("NodeAliasPath", newPath);
DocumentHelper.UpdateDocument(tn, tree);

Thanks,
Scott