c# - Sendgrid- unble to concatinate plaintext along with html hyperlink -

i using sendgrid send email when try concatinate plaintext , html hyperlink seems constructed correct in email email html tag.

my code:

                string myhtml = string.format(@"<a href='{0}'>here</a>", activationlink);                 string message = string.format("dear {0} {1}\n", firstname, lastname) + "to verify email address click ";                 sendmail(email, subject, message, myhtml);       

below sendmail method:

    public bool sendmail(string to, string subject, string message, string htmlcontent)     {         try         {             var client = new sendgridclient(configurationmanager.appsettings["key"].tostring());             emailaddress = new emailaddress(configurationmanager.appsettings["from"].tostring());             var subject = subject;             emailaddress = new emailaddress(to);             string content = message;             //var htmlcontent = "<strong>hello, email!</strong>";             var msg = mailhelper.createsingleemail(from, to, subject, content, htmlcontent);             var response = client.sendemailasync(msg);             return true;         }         catch (exception ex)         {             return false;         }     } 

this in email:

    here(clickable) 

what want appear in mail is:

    dear user verify email address click here (clickable) 

can please me.