Some Email Questions

 I already have been seonding Email from my site, but I waould like to know a couple of things.
1. How do you send email that is html?
Is this done in the code like this?
email.Body = "You Have been entered in Our Free Annual Drawing <br/>First Prize: " + FirstPrizeLabel.Text + ".<br/>Second Prize: " + SecondPrizeLabel.Text + ".<br/>Third Prize: " + ThirdPrizeLabel + "<br/>Drawing Will be Held on: " + AnnualDrawingDate.ToString("dddd, MMMM d, yyyy");
or can you design a page that gets sent.
2. I watched a video on how to set this up, but it didn't explain how to send to recipients in an email list via Sql and MailAddressCollection.
3. How do you program a multiline string in C#
ie
string MyLine = "Some Strings Here";
string MyLine2 = "Some String Here";
but ...