CSharp - Impose a constraint/restriction on properties

Introduction

You want a constraint that the user can set a value if the intended value lies between 10 and 25.

Otherwise, the system will retain the previous value.

Demo

using System;

class MyClass/*from   ww  w. j ava2 s  .c om*/
{
    private int myInt; // also called private "backing" field
    public int MyInt   // The public property
    {
        get
        {
            return myInt;
        }
        set
        {
            /*Imposing a condition:
              value should be in between 10 and 25.
              Otherwise, you'll retain the old value*/

            if ((value >= 10) && (value <= 25))
            {
                myInt = value;
            }
            else
            {
                Console.WriteLine("The new value {0} cannot be set", value);
                Console.WriteLine("Please choose a value between 10 and 25");
            }
        }
    }
}
class Program
{
    static void Main(string[] args)
    {
        MyClass ob = new MyClass();
        //ob.myInt = 10;//Error: myInt is inaccessible
        //Setting  a new value
        ob.MyInt = 10;//Ok.We'll get 10
                      //Reading the value
        Console.WriteLine("\nValue of myInt is now:{0}", ob.MyInt);
        //Setting another value to myInt through MyInt
        ob.MyInt = 100;
        Console.WriteLine("Now myInt value is:{0}", ob.MyInt);//100
    }
}

Result

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