Weather Station--observer mode

    /*Weather Stations*/     Public InterfaceSubject {voidregist (Observer Observer); voidRemove (Observer Observer); voidNotify (); }     Public InterfaceObserver {voidUpDate (Weatherdata weahterdata); }     Public Interfacedisplayelement {voidDisplay (); }     Public classWeatherdata:subject {Private floatm_temperature;  Public floatTemperature {Get{returnM_temperature;} Set            {                if(M_temperature! =value) {M_temperature=value;                Notify (); }            }        }        PrivateList<observer> m_listobservers =NewList<observer>();  Public voidregist (Observer Observer) {if(!M_listobservers.contains (Observer))            {M_LISTOBSERVERS.ADD (Observer); }        }         Public voidRemove (Observer Observer) {if(M_listobservers.contains (Observer)) {M_LISTOBSERVERS.REMOVE (Observer); }        }         Public voidNotify () { for(inti =0; i < M_listobservers.count; i++) {M_listobservers[i]. UpDate ( This); }        }    }     Public classdisplayweathera:displayelement, Observer {floattemperature;  Public voidDisplay () {Console.WriteLine (temperature); }         Public voidUpDate (Weatherdata weahterdata) {temperature=weahterdata.temperature; }    }     Public classdisplayweatherb:displayelement, Observer {floattemperature;  Public voidDisplay () {Console.WriteLine (temperature); }         Public voidUpDate (Weatherdata weahterdata) {temperature=weahterdata.temperature; }    }    classProgram {Static voidMain (string[] args) {Displayweathera DWA=NewDisplayweathera (); Displayweatherb DWB=NewDisplayweatherb (); Weatherdata WD=NewWeatherdata (); Wd.            Regist (DWA); Wd.            Regist (DWB); Wd. Temperature= +; Dwa.            Display (); Dwb.            Display ();        Console.readkey (); }    }

Weather Station--observer mode