Binary Tree In-order Traversal - Incorrect Node Ordering in C#
I'm converting an old project and I'm relatively new to this, so bear with me... I've looked through the documentation and I'm still confused about I'm currently implementing an in-order traversal of a binary tree in C# using recursion, but I'm getting unexpected results in the order of the nodes visited. I expect the output to be in ascending order for a binary search tree, but it seems to be mixed up. Here’s the code I’ve written so far: ```csharp public class TreeNode { public int Val; public TreeNode Left; public TreeNode Right; public TreeNode(int val) { Val = val; Left = null; Right = null; } } public class BinaryTree { public void InOrderTraversal(TreeNode root) { if (root == null) return; InOrderTraversal(root.Left); Console.Write(root.Val + " "); InOrderTraversal(root.Right); } } ``` When I run the traversal on the following tree: ``` 5 / \ 3 7 / \ \ 2 4 8 ``` I invoke the method like this: ```csharp BinaryTree tree = new BinaryTree(); TreeNode root = new TreeNode(5); root.Left = new TreeNode(3); root.Left.Left = new TreeNode(2); root.Left.Right = new TreeNode(4); root.Right = new TreeNode(7); root.Right.Right = new TreeNode(8); tree.InOrderTraversal(root); ``` However, the output I receive is `5 3 2 4 7 8`, which is not the expected `2 3 4 5 7 8`. I’ve confirmed that the tree is constructed correctly. I also checked that my left and right pointers are set properly, but the traversal logic seems to be the scenario. Any insights on what I might be missing? I am using .NET 5.0. I'm working on a API that needs to handle this. For reference, this is a production microservice. Is there a better approach? I'm working with C# in a Docker container on CentOS. Any feedback is welcome!