SmiStream Class 

A helper object used to provide a scratch LOB storage. Allows the server to determine the best underlying storage mechanism for the LOB. The assembly that contains this class has a friend relationship with SQLAccess.dll.  This class is intended for use by SQL Server.  For other databases, use the hosting mechanism provided by that database.

Namespace: Microsoft.SqlServer.Server

Assembly: System.Data (in System.Data.dll)

Friend MustInherit Class SmiStream
internal abstract class SmiStream