private static MemoryCache cache = new MemoryCache(new MemoryCacheOptions()); //定义cache

        public static object GetCacheValue(string key)//获取值

        {

            object val = null;

            if (key != null && cache.TryGetValue(key, out val))

            {

                return val;

            }

            else

            {

                return default(object);

            }

        }

        public static void SetChacheValue(string key, object value)//设置值

        {

            if (key != null)

            {

                cache.Set(key, value, new MemoryCacheEntryOptions

                {

                    SlidingExpiration = TimeSpan.FromSeconds()

                });

            }

        }