Menu Control:

.aspx

Menu ID="Menu1"
runat="server"
orientation="Horizontal"/"Vertical"
StaticEnableDefaultPopOutImage="false"



.aspx.cs

Single Menu

MenuItem fixmenu =new MenuItem();
fixmenu.Text = "Home";
fixmenu.NavigateUrl = "~/Sample1.aspx";
Menu1.Items.Add(fixmenu);


Parent and there child :

//PARENT1
MenuItem parentMenu = new MenuItem();
parentMenu.Text = "Parent";
parentMenu.NavigateUrl = "~/Sample.aspx";
//CHILD1
MenuItem childMenu = new MenuItem();
childMenu.Text = "Child1";
childMenu.NavigateUrl = "~/ChildMenu.aspx";
parentMenu.ChildItems.Add(childMenu);
//CHILD2
MenuItem childMenu2 = new MenuItem();
childMenu2.Text = "Child2";
childMenu2.NavigateUrl = "~/ChildMenu.aspx";
parentMenu.ChildItems.Add(childMenu2);

Menu1.Items.Add(parentMenu);