Added aggregate options for AsQueryable

Author: dkendrick

src/MongoDB.Driver/IMongoCollectionExtensions.cs

@@ -47,10 +47,14 @@ public static IAggregateFluent<TDocument> Aggregate<TDocument>(this IMongoCollec
         /// </summary>
         /// <typeparam name="TDocument">The type of the document.</typeparam>
         /// <param name="collection">The collection.</param>
+        /// <param name="aggregateOptions">The aggregate options</param>
         /// <returns>A queryable source of documents.</returns>
-        public static IMongoQueryable<TDocument> AsQueryable<TDocument>(this IMongoCollection<TDocument> collection)
+        public static IMongoQueryable<TDocument> AsQueryable<TDocument>(this IMongoCollection<TDocument> collection, AggregateOptions aggregateOptions = null)
         {
-            var provider = new MongoQueryProviderImpl<TDocument>(collection, new AggregateOptions());
+            Ensure.IsNotNull(collection, nameof(collection));
+            
+            aggregateOptions = aggregateOptions ?? new AggregateOptions();
+            var provider = new MongoQueryProviderImpl<TDocument>(collection, aggregateOptions);
             return new MongoQueryableImpl<TDocument, TDocument>(provider);
         }