public class Foo { 
          private int a; 
          private int c; 

          public int A {
            get { return a; } 
            set { a = value; } 
         }
 
         public int B {
            get { return 0; } 
         } 

        public int C { 
           set { c = value; } 
       } 

       protected int D { get; set; } 

       protected int E { get; private set; } 

       protected int F { public get; set; } 
 }