Implement mailto link from server side code in ASP.Net

Hi, 

I am trying to open a new outlook window with bcc field filled with addresses on link butotn click server side.

I checked this link Different ways to create mailto: link - ASP.Net and tried the follwing but it doesn't work for me. guide me if I am wrong with something. Thanks

 protected void lnkEmailParticipants_Click(object sender, EventArgs e)

        {
string regUserEmail = dataLoader_VSPNet.getEmailByEmpId(participant.empID);
                    if (regUserEmail != string.Empty)
                    {
ClientScript.RegisterStartupScript(this.GetType(), "mailto",
                            "<script type = 'text/javascript'>parent.location='mailto:" + regUserEmail +
                            "'</script>");
}