Binary Tree, Data Structure Algorithm, Algorithms, Dotnet, Csharp.
Traversal is: [1, 2, 4, 5, 3, 6]: Recursive Approach In the Recursive Approach for Preorder Traversal, we visit each node starting from the root node, then recursively visit the left subtree, and finally recursively visit the right subtree: public static IList<int> RecursiveApproach(TreeNode root)