I created a user conrolt in C# and want to create multiple instance (one by
one) of usercontrol onclick of button. if i hard code in .aspx page like
<%@ Register Src="~/UserControls/AddPhaseMilestone.ascx"
TagName="AddPhaseMilestone" TagPrefix="uc1" %>

We have developed a custom web control that implements ICallbackEventHandler
and fires an event when the callback is invoked.
We had hoped that subscribers to this event would be able to update the
state of other web controls but have been unable to make this work.

When implementing a custom control collection class that implements
IStateManger (and IList), how to save the viewstate of the collection items
if they are controls themselves?

i want to specify evalutionfunction for my custom validator control. i have
tried many ways to get this to work, but in the end, the evaluationfunction
attribute always gets rendered as the default
"CustomValidatorEvaluateFunction":