Each web control offers a SmartTag. It’s that little arrow on the right edge of the control and pops up a list of commands. Here’s how to add a command where the user can pick from a list of types. This is an extension of the Using ITypeDiscoveryService...
While working on Versatile DataSources , I wanted to provide a new design mode feature on properties where you specify the name of a class type. For example, EntityDAODataSource has EntityTypeName and DataContextTypeName. Adding a dropdownlist to a property...