A really stupid question

Im on my way learning .net, but ive come to a snag,

in asp you can do a response.redirect ="whereEver.asp"

so how do you do it in .net?

<%@ Page Language="VB" %>
<script runat="server">

    Sub LoginBtn_Click(Sender As Object, E As EventArgs)
   
        If Page.IsValid Then
            If (UserName.Text = "test") And (UserPass.Text = "test") Then
                FormsAuthentication.RedirectFromLoginPage(UserName.Text, true)
            Else
                Msg.Text = "Invalid Credentials: Please try again"
            End If
        End If
   
    End Sub

</script>