System Reference

The System reference namespace contains fundamental classes and base classes that define commonly used value and reference data types, events and event handlers, interfaces, attributes, and processing exceptions. This default reference is necessary for all BizTalk projects to function properly. Do not delete the System reference.

For more information about the System reference, see "System Namespace" in the Visual Studio Combined Collection at https://go.microsoft.com/fwlink/?LinkId=193568.

See Also

About BizTalk Namespace References Included in BizTalk Projects