private PooledMemoryStreamManager CreatePool()
 {
     return(PooledMemoryStreamManagerBuilder.Create()
            .AddPool(new StreamManagerArrayPool("1", 1024, 1000))
            .AddPool(new StreamManagerArrayPool("2", 10 * 1024, 1000))
            .AddPool(new StreamManagerArrayPool("3", 30 * 1024, 1000))
            .AddPool(new StreamManagerArrayPool("4", 100 * 1024, 100))
            .Build());
 }