Los ámbitos de marcador requieren un host que admita la administración de claves. El host que usa no admite la administración de claves. Si usa WorkflowApplication o WorkflowInvoker, considere la posibilidad de usar WorkflowServiceHost.
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English version
Bookmark scopes require a host that supports key management. The host you are using does not support key management. If you are using WorkflowApplication or WorkflowInvoker consider using WorkflowServiceHost instead.
.Net Framework