Properties Property (ArticleReference)
Setting article reference properties by parent object ids Setting article reference properties by ArticleReferencePropertyList ids Getting article reference user-defined property by parent object
articleReference.ParentObject.Properties[Properties.Function.FUNC_ARTICLE_NOTE, 1] = "ARTICLE_NOTE3";
string note = articleReference.ParentObject.Properties[Properties.Function.FUNC_ARTICLE_NOTE, 1];
articleReference.Properties[Properties.ArticleReference.ARTICLE_NOTE] = "note";
string note = articleReference.Properties[Properties.ArticleReference.ARTICLE_NOTE];
var propertyValue = project.Properties["EPLAN.ArticleRef.UserProperty.1"][1].ToString();