namespace YLErp.BLL.MarginCalculation
{
    public class DefaultMarginCalculation : MarginCalculationBase
    {
        // 定义一个静态变量来保存类的实例
        public static readonly DefaultMarginCalculation Instance;

        static DefaultMarginCalculation()
        {
            Instance = new DefaultMarginCalculation();
        }

        // 定义私有构造函数，使外界不能创建该类实例
        protected DefaultMarginCalculation()
        {

        }
    }
}