How to make streams from BLOBs available in plain old C# objects when using SqlDataReader?

Question

This is the scenario:

• We store files, e.g. relatively large documents (10-300MB), in blobs in our MSSQL database.
• We have a very small domain model so we

Answer 1

That's gorgeous! Thanks for this memory saver. Besides Marc's fix I modified the constructor to open connection and dispose in case the open or execute fails to reduce code/exception handling in caller. (Didn't know Dispose could be called from constructor). Constructor mod:

try
{
    this.command = command;     // store for disposal

    if (command.Connection.State != ConnectionState.Open)
        command.Connection.Open();

    dataReader = command.ExecuteReader(CommandBehavior.SequentialAccess);
    dataReader.Read();            
}
catch (Exception ex)
{
    Dispose();
    throw;
}