underline the text in asp.net menu

trying to underline the text in asp.net menu

#nav-sitemap {
	       color:White;
	        background-repeat:repeat-x;
	        text-decoration:underline;
	        width:100%;
	        clear:both;
        }
        #nav-sitemap 
        {
            color:White;
	        margin:0 0 0px 0;
	        padding:20;
	        text-decoration:underline;
        }
        #nav-sitemap 
        {
            color:White;
	        list-style:none;
	        display:block;
	        width:200px;
	        font-size:14px;
	        font-family:Arial,"Arial",Times,serif;
	        float:left;
	        text-align:center;
	        margin:20;
	        padding-left: 20px;
            padding-right: 20px;
            padding-top: 0;
            padding-bottom: 0;
            text-decoration:underline;
        }
        
        #nav-sitemap a 
        {
            color:White;
	        text-decoration:underline;
	        display:block;
        }

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