MongoQueryableGroupBy Method | 
| Name | Description | |
|---|---|---|
| GroupByTSource, TKey(IMongoQueryableTSource, ExpressionFuncTSource, TKey) | 
            Groups the elements of a sequence according to a specified key selector function.
              | |
| GroupByTSource, TKey, TResult(IMongoQueryableTSource, ExpressionFuncTSource, TKey, ExpressionFuncTKey, IEnumerableTSource, TResult) | 
            Groups the elements of a sequence according to a specified key selector function
            and creates a result value from each group and its key.
              |