DirectoryCatalog.Refresh Method ()
Refreshes the ComposablePartDefinition objects with the latest files in the directory that match the search pattern.
Assembly: System.ComponentModel.Composition (in System.ComponentModel.Composition.dll)
If files were added to the directory, they are also added to the catalog. If files were removed from the directory, they are also removed from the catalog. For files that have been removed, the assembly cannot be unloaded from the process, so ComposablePartDefinition objects for those files will be removed only from the catalog.
Available since 4.0