Put button inside e-mail

Hello everybody okay?
I have a problem, I want the message in an e-mail that will be sent to you to recover the password for this, appears a button, I have the following code.

message.AppendLine(@"<a href= " + url +""); message.AppendLine(@" target=""_blank""><input type=""Submit"" style=""background-color:Blue; height: 20px; width: 230px; border: 0px solid gray; -moz-border-radius: 10px; -webkit-border-radius: 10px; border-radius: 5px; -moz-box-shadow: 0 0 10px gray, inset 0 0 15px gray; -webkit-box-shadow: 0 0 10px gray, inset 0 0 15px gray; font-family: Arial; font-size: 12px; font-weight: bold; text-decoration: none; color: #F2F2F2; cursor: pointer;"" value=""Clique para recuperar a password."" /></a>"); message.AppendLine(@"<br />"); message.AppendLine(@"Caso o b ...