Why does the usage of auto properties( in the class Car, color property) not throw any stack overflow exception while the same property (colour) which is not automatic throws error.?

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C#

namespace WorkingOut
{
    interface IColor
    {

        
        void Getcolor();
         string display();


    }
    class Car:IColor
    {

        public string carName
        {
            get;
            set;
        }
        public Car(string CarName)
        {
          this.carName=CarName;

        }
            public string Describe()
            {

                return "the name of the car is "+carName+"\n colour of the car: "+color;
            }



            public string display()
            {
                return "colour of the car is "+color;
            }

            public string color
            {
                get;
                set;

            }

            public void Getcolor()
            {
                Console.WriteLine("ENTER THE color of the car "+carName);
                color = Console.ReadLine();


            }
    }
    class Program
    {
        static void Main(string[] args)
        {
            
            char ans='y';
            List<Car> Cab = new List<Car>();
            while ((ans) != 'n' || (ans) != 'n')
            {
                Console.WriteLine("enter the cab name");
                Cab.Add(new Car(Console.ReadLine()));
                Console.WriteLine("wanna continue? press N to quit, Y to continue");
                ans=Convert.ToChar( Console.ReadLine());
                
            }
            
            foreach(Car c in Cab)
            {
                
                c.Getcolor();
                c.display();
            }
            foreach (Car c in Cab)
            { Console.WriteLine(c.Describe()); }

            Console.ReadLine();
            }
    }

    }

Posted 27-Apr-15 3:40am

PrawinS

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Comments

Sascha Lefèvre 27-Apr-15 9:49am

I don't see a non-automatic property "colour" there..?

2 solutions

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This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

Sascha Lefèvre · Answer 1 · 2015-04-27T04:01:00

While it's not completely clear from the code that you posted, I'm pretty certain that your issue is because of the following mistake:

C#

class StackoverflowExample
{
   // you're calling the property from itself
   // and then it will call itself again and again and again...
   // leading to a stack overflow

   public string SomeProperty
   {
      get { return SomeProperty;  } 
      set { SomeProperty = value; }
   }
}

A properly implemented non-automatic property has to have a "backing field":

C#

class PropertyWithBackingFieldExample
{
   private string SomePropertyBackingField;

   public string SomeProperty
   {
      get { return SomePropertyBackingField;  }
      set { SomePropertyBackingField = value; }
   }
}

Automatic properties actually are exactly the same - just not visible in the source code, because the compiler will implement the backing field for you automatically.

PrawinS · Answer 2 · 2015-04-27T04:16:00

C#

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

            }

this is the non-automatic property. if i use this instead of the following code,

            public string color
            {
                get;
                set;

            }

, it simply throws stack overflow error.

Why does the usage of auto properties( in the class Car, color property) not throw any stack overflow exception while the same property (colour) which is not automatic throws error.?

2 solutions

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Solution 2

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Why does the usage of auto properties( in the class Car, color property) not throw any stack overflow exception while the same property (colour) which is not automatic throws error.?

2 solutions

Solution 1

Solution 2

Add your solution here

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