Using the .NET/C# Driver, the following MQL (as seen in the linked ticket) does not work: 

{ Roles : { $elemMatch : { $or : [{ $eq : 1 }, { $eq : 2 }] } } } 

Any suggestions for what the Driver should be doing instead?

{ Roles : { $in : [1, 2] } }

 will work for this specific case but we want to support it using LINQ (LINQ is a general purpose translator and the arguments to $or might not be $eq comparisons.)