internal static ConcurrentDictionary<Guid, CustomAdapter> _dicCustomAdater = Utils.GlobalCacheFactory.CreateCacheItem<ConcurrentDictionary<Guid, CustomAdapter>>();

// 或
    internal static ConcurrentDictionary<Guid, CustomAdapter> _dicCustomAdater = Utils.GlobalCacheFactory.CreateCacheItem(new ConcurrentDictionary<Guid, CustomAdapter>);

    public interface IGlobalCacheFactory
    {
        T CreateCacheItem<T>(T defaultValue = null) where T : class, new();
        T CreateCacheItem<T>() where T : new();
    }

    public class DefaultCacheFactory : IGlobalCacheFactory
    {
        public T CreateCacheItem<T>(T defaultValue = null) where T : class, new()
        {
            return defaultValue ?? new T();
        }

        public T CreateCacheItem<T>() where T : new()
        {
            return new T();
        }
    }