Copy known metadata properties from source package to destination package. The operation is Recursive so it affects all nested packages as well. If an existing property its value is updated. If there is a known property missing in a destination package it is added to the package. If there is a known property missing in a source package it is not remove from destination package. If that need use Sanitize method before.... The operation is recursive so it affects all nested packages...package. The operation is recursive so it affects all nested packages...