Create a customized template control:

public class TestViewStateControl: WebControl
	{
		[PersistenceMode(PersistenceMode.InnerProperty)]
		public ITemplate ContentTemplate { get; set;}

		protected override void CreateChildControls()
		{
			if ( ContentTemplate != null)
			{
				WebControl container = new WebControl(HtmlTextWriterTag.Div);
				ContentTemplate.InstantiateIn(container);
				Controls.Add(container);
			}
			base.CreateChildControls();
		}
	}

Then add this control to page:

	<custom:TestViewStateControl ID="testViewState" runat="server" EnableViewState="true" 
		BackColor="Aquamarine" Height="100px" Width="200px">
		<ContentTemplate>
			<asp:Button ID="btnHideParent" runat="server" Text="Hide" OnClick="btnHideParent_Click" />
		</ContentTemplate>
	</custom:TestViewStateControl>

The "bthHideParent_Click" method, set parent's Visibility property to false like this:

	protected void btnHideParent_Click(object sender, EventArgs e)
	{
		testViewState.Visible = false;
	}

If you run this page, click the button will not causing the "testViewState" control to become invisible. Even if I turn off view state it is still not working as I expected