public class Foo 
    { 
           private double field;

           public double A 
           { 
                get { return field + 10.0; }        // 1 
                set { field = value - 10.0; }       // 2 
            } 
            public int B { get; private set; }    // 3 
       }

      public static class Program 
     { 
        public static void Main() 
       { 
           Foo f = new Foo(); 

          double a = f.A;      // 4 
          int b = f.B;          // 5 
          f.B = 10;            // 6 
       } 
   }