Paths in master pages

<link href="../../Content/Site.css" rel="stylesheet" type="text/css" />

<link href="Content/Site.css" rel="stylesheet" type="text/css" />

<script src="../../Content/menu.js" type="text/javascript"></script>

<script src="<%= ResolveClientUrl("~/Content/menu.js") %>" type="text/javascript"></script>

public static string ResolveUrl(this HtmlHelper helper, string virtualUrl)
{
    HttpContextBase ctx = helper.ViewContext.HttpContext;
    string result = virtualUrl;

    if (virtualUrl.StartsWith("~/"))
    {
        virtualUrl = virtualUrl.Remove(0, 2);

        //get the site root
        string siteRoot = ctx.Request.ApplicationPath;

        if (!siteRoot.EndsWith("/"))
            siteRoot += "/";

        result = siteRoot + virtualUrl;
    }
    return result;
}

<script type="text/javascript" src="<%= Html.ResolveUrl("~/Content/menu.js")%>"></script>

<link href="~/Content/Site.css" rel="stylesheet" type="text/css" />