If you get this surprise error after converting the asp.net project.
This is what you need to do
Original
<%# Container.DataItem("ID") %>
Change to
CType(Container.DataItem, DataRowView)("ID").ToString
This solve your problem.
To set Option Strict in the integrated development environment (IDE)
On the Tools menu, choose Options.
Open the Projects and Solutions node.
Choose VB Defaults.
Modify the Option Strict setting.
To set Option Strict on the command line
Include the /optionstrict compiler option in the vbc command.
Suresh Behera