public TreeNode[] GetMock1() { TreeNode node1 = new TreeNode(1); node1.left = new TreeNode(3); node1.left.left = new TreeNode(5); node1.right = new TreeNode(2); TreeNode node2 = new TreeNode(2); node2.left = new TreeNode(1); node2.right = new TreeNode(3); node2.left.right = new TreeNode(4); node2.right.right = new TreeNode(7); TreeNode[] treeArr = new TreeNode[2]; treeArr.SetValue(node1, 0); treeArr.SetValue(node2, 1); return(treeArr); }