MDPart oPart = m_MDPartsDatabase.Parts[0];//a valid part object MDPropertyValue oProperty = oPart.Properties[Eplan.EplApi.MasterData.Properties.MDPartsDatabaseItem.ARTICLE_FREE_DATA_VALUE;]; if (oProperty.Definition.IsIndexed) { foreach (int index in oProperty.Indexes) { MDPropertyValue oPropertyElement = oProperty[index]; string sProperty = oPropertyElement.ToString(); } }