// It Is a subject That may be different in each occasion of a class private int _field; // That is a property that accesses a discipline, but as it's visibility // is safeguarded only subclasses will know relating to this property // (and thru it the sphere) - https://propertyingurugram.in/new-60-km-rapid-rail-route-proposed-to-link-gurugram-faridabad-and-noida/