May be late to the game, but MSSQL 2008 R2 SP2 fix that.

the other option /works for me/:

My main function indeed had some arguments as SqlBytes XX1, XX2 ....

and by the end

foreach( var row in rows)

yield return row;

I was getting error, shown in the article, while

return rows was OK.

Simple move of yield statement in separate function fixed it.

....

return InfoOut( row);

private static IEnumerable InfoOut( List<Row> rows)

{

foreach( var row in rows)

yield return row;

}