Email style does not work in gmail

using System.Web.Mail;

public partial class _Default : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
MailMessage msgMail = new MailMessage();

msgMail.To = "to@gmail.com";
msgMail.From = "From@gmail.com";
msgMail.Subject = "This is a test mail";

msgMail.BodyFormat = MailFormat.Html;
string strBody = "<table style=border:solid 1px red;color:#CCCCCC font-family:Tahoma><tr style=color:red; ><td style=width:25%>Hi </td><td> This is a test mail </ br>This is Email Body Text </td></tr></table>";
msgMail.Body = strBody;

SmtpMail.Send(msgMail);
}
}

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