/*/*Here We will add some css for style our treeview*/
    .treeview ul li .collapse {
        width:15px;
        background-image: url('../Images/ui-icons_454545_256x240.png');
        background-repeat: no-repeat;
        background-position: -36px -17px;
        display:inline-block;
        cursor:pointer;
    }
    .treeview ul li .expand {
        width: 15px;
        background-image: url('../Images/ui-icons_454545_256x240.png');
        background-repeat: no-repeat;
        background-position: -50px -17px;
        display: inline-block;
        cursor:pointer;
    }
    
     .treeview ul
        {
            font:14px Arial, Sans-Serif;
            margin:0px;
            padding-left:10px;
            list-style:none;
        }
        .treeview > li > a {
            font-weight:bold;
            line-height:1.2em;
        }

        .treeview li a
        {
            padding:4px;
            font-size:12px;
            display:inline-block;
            text-decoration:none;
            width:auto;
            line-height:1.2em;
        }