Web Forms :: Getting All Added Controls Instead Of Intended Page?

Most of my pages use a master page. If I design the page completely in the Design View the controls display on the page properly, within their content placeholder space. But if I add the control programatically, its added outside the content placeholder area, which is to say, its basically added to the masterpage.

Im trying to programatically add a System.Web.UI.WebControls.Table to a page in the Page_Load event with the following statement:

Table table1 = new Table();

this.Controls.Add(table1);

Everytime I view the page, the table is showing up below the <asp:Content></asp:Content> elements where Master content should be displayed. Do I have to add the table to the Content Control on the Masterpage? And if so, what would that code statement look like.