Server.Transfer method with Query String

Hi all,
I am beginner learning ASP.NET with C# as the programming language.
Currently I am working with HTTPSERVERUTILITY.
I have created a web form named as Default.aspx and Default2.aspx:
I have written the following coding :
Default.aspx:
In source view
<body>
    <form id="form1" runat="server">
    <div>
    
        <asp:Button ID="Button1" runat="server" onclick="Button1_Click" Text="Button" />
    
    </div>
    </form>
</body>


In Code-behind file:
protected void Button1_Click(object sender, EventArgs e)
    {
       
        Server.Transfer(&q ...