Dynamically create control and set id for control in asp.net

Under Page Init
Private Sub Page_Init(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Init
    ' Create dynamic controls here.
    TextBox1 = New TextBox()
    TextBox1.ID = "TextBox1"
    TextBox1.Style("Position") = "Absolute"
    TextBox1.Style("Top") = "25px"
    TextBox1.Style("Left") = "100px"
    Form1.Controls.Add(TextBox1) 
    InitializeComponent()
End Sub
Text properties under text load
Private Sub Page_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
    If Not IsPostBack Then
        TextBox1.Text = "TextBox1"
    End If
End Sub

TextBox TextChanged events
Private Sub TextBox_TextChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles TextBox1.TextChanged, TextBox2.TextChanged
    Dim txtBoxSender As TextBox
    Dim strTextBoxID As String

    txtBoxSender = CType(sender, TextBox)
    strTextBoxID = txtBoxSender.ID

    Select Case strTextBoxID
        Case "TextBox1"
            Label3.Text = "TextBox1 text was changed"
      
    End Select
End Sub

 protected void Page_Load(object sender, EventArgs e)
        {
            LinkButton lnk = new LinkButton();
            lnk.ID = "lnk" + 1;
            lnk.Text = "more1";
            lnk.Click += new EventHandler(LinkButton3_Click);
            form1.Controls.Add(lnk);
        }

        protected void LinkButton3_Click(object sender, EventArgs e)
        {
            Response.Write("Link Button Clicked");
        }

TextBox txt = new TextBox();
            txt.ID = "TxtName";
            txt.Text = "Name";
            form1.Controls.Add(txt);