public string InspectBuilding() { var toReturn = new StringBuilder(); var electrical = new Electrical(); var foundation = new Foundation(); var plumbing = new Plumbing(); var roof = new Roof(); toReturn.AppendLine(electrical.InspectWiring()); toReturn.AppendLine(foundation.InspectFoundation()); toReturn.AppendLine(plumbing.InspectPlumbing()); toReturn.AppendLine(roof.InspectRoof()); return(toReturn.ToString()); }