SqlTriggerContext object
Applies to: 
SQL Server
The .NET Framework common language runtime (CLR) SqlTriggerContext class provides context information about the trigger. This contextual information includes the type of action that caused the trigger to fire, which columns were modified in an UPDATE operation, and, with a data definition language (DDL) trigger, an XML EventData structure that describes the triggering operation.
For more information and examples of how to use the SqlTriggerContext class, see CLR triggers and Microsoft.SqlServer.Server.SqlTriggerContext.