Microsoft.SqlServer.Dts.Design Namespace

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.

HelpContextAttributeDefines a HelpContextAttribute attribute for the HelpContextAttribute class.

IComponentErrorInfoProvides detailed information about an error or warning event generated by SSIS control flow or data flow components during design.
IDtsClipboardServiceProvides 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.
IDtsPipelineEnvironmentServiceGives data flow components access to the parent Data Flow task and its TaskHost container.This interface is not CLS-compliant.
IErrorCollectionServiceUsed 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.