Will Help in debugging on your local computer

LeetCodeTreeMaker.cs

public class Program
{
	static void Main(string[] args)
	{
		var arr = new int[] {1,2,3,4,5,6,7,8,9};
		var tree = new LeetCodeTree().MakeTree(arr);
		BFS(tree); 
	}
}
public class LeetCodeTree
{
	int[] arr;
	int m = 0;
	public TreeNode MakeTree(int[] array)
	{
		if (array.Length == 0) return null; 
		
		arr = array;
		var root = new TreeNode(arr[m++]);
		for (int i = 0; i <= Math.Log(arr.Length, 2) + 1; i++)
		  Add(root, i, 0);
		  
		return root;
	}
	public void Add(TreeNode root, int depth, int i)
	{
		if (root == null) return;

		if (i == depth - 2)
		{
			if (m < arr.Length)
				root.left = new TreeNode(arr[m++], root.left, null);
			if (m < arr.Length)
				root.right = new TreeNode(arr[m++], null, root.right);
			return;
		}

		Add(root.left, depth, i + 1);
		Add(root.right, depth, i + 1);
	}
}
public class TreeNode
{
	public int value;
	public TreeNode left;
	public TreeNode right;
	public TreeNode(int val = 0, TreeNode left = null, TreeNode right = null)
	{
		this.value = val;
		this.left = left;
		this.right = right;
	}
}