c# - MEF. Enforce PartCreationPolicy to be CreationPolicy.Shared in custom ExportAttribute -


i have following custom attribute inherits mef's exportattribute:

[attributeusage(attributetargets.class)] public class definesettingsattribute : exportattribute {      public definesettingsattribute() : base(typeof(definesettingsattribute)) { } }

i enforce shared creation policy in classes decorated attribute. can achieve with:

[definesettings] [partcreationpolicy(creationpolicy.shared)] public class foo { }

this way import explicit non-shared fail. nevertheless need no make custom attribute, final code looks this:

[definesettings] public class foo { }

the way have made work discovering decorated types , add them partcreationpolicy attribute using reflection. wonder if there more elegant , better way.


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