Inner struct containing the fields, outer class for the clas

    // Container of the "real" data
    struct FooInternal
    {
        public int Foo1;
        public int Foo2;
        public List<int> Foos;
    }

    class Foo
    {
        private FooInternal FooInternal;

        public Foo()
        {
            this.FooInternal.Foos = new List<int>();
        }

        public Foo(Foo other)
        {
            // "clone" operation
            this.FooInternal = other.FooInternal;
        }

        /* Proxies */

        public int Foo1
        {
            get
            {
                return this.FooInternal.Foo1;
            }

            set
            {
                this.FooInternal.Foo1 = value;
            }
        }

        public int Foo2
        {
            get
            {
                return this.FooInternal.Foo2;
            }

            set
            {
                this.FooInternal.Foo2 = value;
            }
        }

        public List<int> Foos
        {
            get
            {
                return this.FooInternal.Foos;
            }

            set
            {
                this.FooInternal.Foos = value;
            }
        }
    }