The namespace Microsoft.SqlServer.Dts.Design contains classes and interfaces to create user interface elements and connect them to the tasks so properties of the tasks can be set.
Provides developers using the task and transform user interface the ability to query if their task or transform was generated as part of a copy/paste or cut/paste operation.
Used to capture events from data flow components when you need to capture all the errors and warnings raised by the component instead of receiving only the last error or warning.