ASP.NET Button to redirect to another page

Either you need to use Response.Redirect("YourPage.aspx"); 
or  
Server.Transfer("YourPage.aspx"); on your button click event.
So it will be like the following:

protected void btnConfirm_Click(object sender, EventArgs e)
{
    Response.Redirect("YourPage.aspx");
    //or
    Server.Transfer("YourPage.aspx");
}