contact form Update DB

2 questions:
1. I cant seem to use the type of email like this: <asp:TextBox ID="Email" Type="email" runat="server"/>
I am using .net 4.0 and my machine has 4.5 installed so I am assuming it should have all of those other updates needed for 4.0 as noted here: http://stackoverflow.com/questions/9801120/html5-email-input-cannot-assign-id-and-runat-server-asp-net-4
2. I am using this form to update my DB. Do I need to use variables when assigning the form values like I did with php ($_GET["email"])
or is this ok?
Feedback fb = new Feedback(); fb.User_Number = CurrentUser.UserNumber; fb.Name = Name.Text; fb.Email ...