input: [Category] Concurrency Management [Description] Calls enter the service on worker threads. If the service needs to update Windows Forms forms and controls, it must marshal the update to the UI thread(s). Instead of using the synchronization context directly which serializes all calls to the service, you can use IDesign set of thread-safe Windows Forms controls - any service can access them as if running on the UI thread. This enables the same service to update multiple forms on multiple threads, and only marshal when necessary. [Last Updated] 9/7/2006 [Title] 
output: Safe Controls