CLR version on client

Click once deployment requires CLR to be present on target machine to verify manifest. Following snippets help in detecting the same.

Snippets work with IE5+ and Firefox 3+ only. They fail with Chrome.

Server Side:

protected void Page_Load(object sender, EventArgs e)
{
    bool clrOK = Request.Browser.ClrVersion > new Version(3, 0);
    if (clrOK)
        Response.Write("CLR Version : " + Request.Browser.ClrVersion);
    else
        Response.Write("This machine does not have Microsoft .NET Framework version 3.5 SP1.  Install and try again.");
}

Client Side:

<script type="text/javascript">

    function DetectCLR(targetVersion) {
        //Gets CLR version on IE5+ and Firefox 3+
        var uagent = navigator.userAgent;

        //Form regular expression
        var clrRegExp = new RegExp(".NET CLR \\d.\\d.\\d{5}", "g");

        //Get Matches
        var clrversions = uagent.match(clrRegExp);

        //Is CLR present
        if (clrversions == null)
            document.write("Please install Microsoft .Net Framework 3.5 SP1 and try again");

        //Possible .NET CLR versions for v2 and above
        //.NET CLR 2.0.50727
        //.NET CLR 3.0.04506
        //.NET CLR 3.5.21022
        //.NET CLR 3.5.30729
        var arraylength = clrversions.length;
        var clrversiondetected;
        for (var i = 0; i < arraylength; i++) {
            //document.write(clrversions[i] + "</br>");
            clrversiondetected = (clrversions[i] == targetVersion);
        }


        if (!clrversiondetected)
            document.write("Please install Microsoft .Net Framework 3.5 SP1 and try again");
        else
            document.write("CLR Version : <b>" + targetVersion + "</b>");

        return clrversiondetected;
    }
</script>