c# - Property or indexer cannot be assigned to - it is read only -

hey started c# class 2 weeks ago beginner programmer , having trouble code. have 2 classes, 1 of them test case runs program , other has private variables. variables color, numofwheels, startingpoint, currentspeed, , mileage says property or indexer cannot assigned - read when try build it. how fix this?

using system; using system.collections.generic; using system.linq; using system.text; using system.threading.tasks;  namespace homework1  {     class car     {         private string color;         private int numofwheels;         private int startingpoint;         private int mileage;         private int currentspeed;          public car()         {             color = "";             numofwheels = 4;             startingpoint = 100000;             currentspeed = 0;             mileage = 0;         }          public car(string color, int numofwheels, int startingpoint, int currentspeed, int mileage)         {             color = color;             numofwheels = numofwheels;             startingpoint = startingpoint;             currentspeed = currentspeed;             mileage = mileage;         }          public virtual void setcolor(string color)         {             this.color = color;         }          public virtual void setnumofwheels(int numofwheels)         {             this.numofwheels = numofwheels;         }           public virtual string color         {                         {                 return color;             }         }          public virtual double numofwheels         {                         {                 return numofwheels;             }         }          public virtual int startingpoint         {                         {                 return startingpoint;             }         }          public virtual int currentspeed         {                         {                 return currentspeed;             }         }          public virtual int mileage         {                         {                 return mileage;             }         }           public override string tostring()         {             return (" color " + color + " numofwheels" + numofwheels + "startingpoint " + startingpoint + "mileage" + mileage + "current speed" + currentspeed);         }      } }  ******************************************************************************** ///  test case runs program  using system; using system.collections.generic; using system.linq; using system.text; using system.threading.tasks;  namespace consoleapplication8 {     class cartest     {        static void main(string[] args)         {               car mycar = new car();                   console.writeline("*****************************");                  console.writeline("*                           *");                  console.writeline("* welcome car manager    *");                 console.writeline("*  <<my name>>   *");                  console.writeline("*                           *");                 console.writeline("*****************************");                console.writeline("\nenter number of wheels of car");             int numofwheels = console.read();                 mycar.setwheels(numofwheels);                console.writeline("enter color of car");             string color = console.readline();              console.writeline("current mileage set zero");              console.writeline("the current starting point set 100000");              console.write("the current status of car \n{0:d} wheels, \n{1}, \n{2:d} miles , \ncar point = {3:d}", mycar.getnumofwheels,              mycar.getcolor, mycar.getmileage, mycar.getstartingpoint);              console.writeline("\nenter owner's name");             string name = console.readline();              console.writeline("enter miles car ran in week");             int milesthisweek = console.readline;             mycar.setmileage(mileage);              console.writeline("this car owned n{1}", name);                    console.writeline("===>the current status of car:");             console.writeline("wheels: " + mycar.getwheels());             console.writeline("color: " + mycar.getcolor());                 console.writeline("current mileage: " + mycar.getmileage());             console.writeline("starting point: " + mycar.getstartingpoint());             console.writeline("************ thank using car manager *************");             console.writeline("----------------------------------------------------------");             console.writeline("----------------------------------------------------------");             console.writeline("press enter close console…….");             }     } } 

you're trying set property:

color = ""; 

(among other places) property doesn't have setter, getter:

public virtual string color {         {         return color;     } } 

in order set value of property, needs setter:

public virtual string color {         {         return color;     }     set     {         color = value;     } } 

(repeat other properties well)

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it looks like you're trying create java-like setter methods:

public virtual void setcolor(string color) {     this.color = color; } 

this works, , can call instead of trying set properties:

setcolor(""); 

but it's not expected convention in c#. properties can manage backing variables themselves. in fact, can remove backing variables entirely , use auto-implemented properties simple values:

public virtual string color { get; set; } 

if need hold value, simple property fine. methods more operations in code, not getting/setting simple values. (additionally, wouldn't want habit of calling lot of methods constructor. constructor should build state of object , nothing else.)