When can View state Information about dynamically created controls cause Problems

108.

View state information can cause problems if you insert controls dynamically and then reinsert the controls with different values during round trip

View State information can cause problems if you set the EnableViewState property of the container control to false

View State Information can cause problems if you place dynamic controls between existing controls

View State Information can cause problems if you add dynamic controls to the end of a container's group of controls

both 1 and 3

View Description

When you place dynamic controls between other existing controls, Visual Studio inserts the view state information into a specific area of the view state structure.When you upload the Web page and the view state loads,the dynamic control doesn't exist,so the information in view state doesn't apply to the appropriate control and you will get an invalid cast erros.