You create a Web page named TestPage.aspx and a user control named contained in a file named
TestUserControl.ascx. You need to dynamically add TestUserControl.ascx to TestPage.aspx. Which
code segment should you use?

A.
protected void Page_Load(object sender, EventArgs e)
{
Control userControl = Page.LoadControl(“TestUserControl.ascx”);

Page.Form.Controls.Add(userControl);
}

B.
protected void Page_Load(object sender, EventArgs e)
{
Control userControl = Page.FindControl(“TestUserControl.ascx”);
Page.Form.Controls.Load(userControl);
}

C.
protected void Page_PreInit(object sender, EventArgs e)
{
Control userControl = Page.LoadControl(“TestUserControl.ascx”);
Page.Form.Controls.Add(userControl);
}

D.
protected void Page_PreInit(object sender, EventArgs e)
{
Control userControl = Page.FindControl(“TestUserControl.ascx”);
Page.Form.Controls.Load(userControl);
}

Explanation:
Dynamic controls should be added in preinit event for them to participate in view state. Check
description of preinit and init events on page-105 of Microsoft Press book MCTS 70-515.
Exam collection says C. Page_PreInit