Pass variables with method post

I have one page with the code:
<form id="form1" runat="server" method="post">
    <div>
   
        Nome:&nbsp;&nbsp;
        <asp:TextBox ID="nome" runat="server"></asp:TextBox>
        <br />
        Idade:<asp:TextBox ID="TextBox2" runat="server" Width="71px"></asp:TextBox>
        <br />
        <br />
        <asp:Button ID="Button1" runat="server" Text="Button" />
        <br /& ...