public class Solution {
    public void Mirror(TreeNode root) {
    	if(root!=null)
     {
          TreeNode temp= root.left;
          root.left=root.right;
          root.right=temp;
          if(root.left!=null)
          Mirror(root.left);
          if(root.right!=null)
          Mirror(root.right);
       }
    }
    }