textBox losing values on postback?

Question

I have asp.net page (Form = runat server )

2 textboxes:

<input type="text" id="tb1" />
<asp:TextBox ID="tb2" runat="server" />

and a button submit.

However when I put some values in them - and press the button - Only tb2 is getting back its value from the server.

I thought that inputs fields values are going from client to server and back always !

in what event ( in page life cycle) Does tb1 lose its value ?

Answer 1

<input type="text" id="tb1" /> is literal HTML.
There is no server-side code that puts the value back in.

That feature is part of server-side controls.