GroupBySelectClauseRewriter fails or is suboptimal on .Net 4.0

GroupBySelectClauseRewriter.TryFindTransparentPropertyOfAnonymousObject() can fail to match members that should be matched when running on .Net 4.0. This is because it expects NewExpression.Members to contain MethodInfo instances (with a prefix on the name), but on .Net 4 it contains PropertyInfo instances instead.