static void Main(string[] args)
{
Tree theTree = new Tree();
theTree.Insert(20);
theTree.Insert(25);
theTree.Insert(45);
theTree.Insert(15);
theTree.Insert(67);
theTree.Insert(43);
theTree.Insert(80);
theTree.Insert(33);
theTree.Insert(67);
theTree.Insert(99);
theTree.Insert(91);
Console.WriteLine("Inorder Traversal : ");
theTree.Inorder(theTree.ReturnRoot());
Console.WriteLine(" ");
Console.WriteLine();
Console.WriteLine("Preorder Traversal : ");
theTree.Preorder(theTree.ReturnRoot());
Console.WriteLine(" ");
Console.WriteLine();
Console.WriteLine("Postorder Traversal : ");
theTree.Postorder(theTree.ReturnRoot());
Console.WriteLine(" ");
Console.ReadLine();
}