👀 Views: 72 💬 Answers: 1 📅 Created: 2025-06-20

c# binary-tree recursion iteration stack-overflow C#

Can someone help me understand I tried several approaches but none seem to work. I'm currently working on a project where I need to traverse a binary tree recursively in C#. However, I'm encountering a `StackOverflowException` when the tree depth exceeds a certain level. My current implementation looks like this: ```csharp public class TreeNode { public int Value; public TreeNode Left; public TreeNode Right; public TreeNode(int value) { Value = value; Left = Right = null; } } public void InOrderTraversal(TreeNode node) { if (node == null) return; InOrderTraversal(node.Left); Console.WriteLine(node.Value); InOrderTraversal(node.Right); } ``` I call this method like so: ```csharp TreeNode root = new TreeNode(1); root.Left = new TreeNode(2); root.Right = new TreeNode(3); // Add more nodes to create a deeper tree InOrderTraversal(root); ``` When I create a tree with a depth of about 1000 nodes, I get a `System.StackOverflowException`. I've researched this and found that C# has a default stack size limitation, but I'm not sure how to handle deep trees effectively without running into this issue. I considered converting my recursive approach to an iterative one using a stack data structure, but I'm unsure how to implement it correctly. Here's what I attempted: ```csharp public void InOrderTraversalIterative(TreeNode root) { Stack<TreeNode> stack = new Stack<TreeNode>(); TreeNode current = root; while (stack.Count > 0 || current != null) { while (current != null) { stack.Push(current); current = current.Left; } current = stack.Pop(); Console.WriteLine(current.Value); current = current.Right; } } ``` However, I still face issues with this configuration, particularly with how to add nodes properly. Can someone provide guidance on the correct way to implement the iterative traversal or suggest a way to handle large trees without running into stack overflow problems? Any best practices would also be appreciated. I'm using .NET 5.0 for this project. My development environment is macOS.