public static ILInstanceHolderPoolItem Alloc(Type Type, object Value = null)
        {
            lock (TypePools)
            {
                if (!TypePools.ContainsKey(Type))
                {
                    TypePools[Type] = new List <ILInstanceHolderPool>();
                }
                var PoolsType = TypePools[Type];
                var FreePool  = PoolsType.Where(Pool => Pool.HasAvailable).FirstOrDefault();
                if (FreePool == null)
                {
                    int NextPoolSize = 1 << (PoolsType.Count + 2);
                    //if (NextPoolSize < 2048) NextPoolSize = 2048;

#if DEBUG_ILINSTANCEHOLDERPOOL_TIME
                    Console.BackgroundColor = ConsoleColor.DarkRed;
                    Console.Error.Write("Create ILInstanceHolderPool({0})[{1}]...", Type, NextPoolSize);
                    var Start = DateTime.UtcNow;
#endif
                    PoolsType.Add(FreePool = new ILInstanceHolderPool(Type, NextPoolSize));
#if DEBUG_ILINSTANCEHOLDERPOOL_TIME
                    var End = DateTime.UtcNow;
                    Console.Error.WriteLine("Ok({0})", End - Start);
                    Console.ResetColor();
#endif
                }
                var Item = FreePool.Alloc();
                Item.Value = Value;
                return(Item);
            }
        }