Generates a Hyper Link to redirect user to Authentication form

public static string SPUtilGenerateAuthenticationHyperLink(this Page p , string title , string InnerText)
{

    try
    {
        string url = p.Request.Url.Scheme + "://" + p.Request.Url.Authority + "/_layouts/Authenticate.aspx?Source=" + p.Request.Url.LocalPath;
        string Tag_A = "<a href=\"" + url + "\" title=\""+title+"\">" + InnerText + "</a>";
        return Tag_A;
    }
    catch
    {
        string Tag_A = "<a href=\"#ERROR\" title=\""+title+"\">" + InnerText + "</a>";

        return Tag_A;
    }
    
}

string Tag_A = Page.SPUtilGenerateAuthenticationHyperLink("To Login Click Here", " Here ");
 lit_Msg.Text = "You are not logged in . please log in at first & click " + Tag_A + " to show Authentication Form";