using System;
using System.Linq;
using System.Reflection;

namespace SO16515341
{
    class RestMethods
    {
        static void Main()
        {
            Console.WriteLine(A.Test);
            A.Clear();
            Console.WriteLine(A.Test);
        }

        public static void ClearAllStaticValues(Type t)
        {
            var varList = t.GetFields(BindingFlags.NonPublic | BindingFlags.Static);
            varList.Where(x => x.FieldType == typeof(Int32)).ToList().ForEach(x => x.SetValue(null, 0));
        }
    }

    public class A
    {
        private static int test = 100;

        public static int Test { get { return test; } }
        public static void Clear()
        {
            //static member 
            RestMethods.ClearAllStaticValues(typeof(A));
        }

        public void ClearInstance()
        {
            //instance member
            RestMethods.ClearAllStaticValues(GetType());
        }
    }
}