# How to traverse binary tree by breadth (Part II) ?

Here I will introduce the breadth first traversal of binary tree.

The principe is that you traverse the binary tree level by level.

This traversal is quite different than depth first traversal. In depth first traversal you can use recursive method to traverse.

Here is one solution using a queue.

```
/// <summary>
/// breadth-first traversal 宽度遍历树
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="node"></param>
public void Traversal<T>(Node<T> node)
{
//create a Node<T> queue
var treeQueue = new Queue<Node<T>>();
//initialize queue with tree root node
treeQueue.Enqueue(node);
//if queue has elements
while (treeQueue.Count > 0)
{
//dequeue the queue's first node
Node<T> current = treeQueue.Dequeue();
//print the node name
PrintNodeName(current);
//if node has Left leaf, enqueue it
if (current.LNode != null)
treeQueue.Enqueue(current.LNode);
//if node has right leaf, enqueue it
if (current.RNode != null)
treeQueue.Enqueue(current.RNode);
}
}
```