MongoQueryableFirstAsync Method | 
| Name | Description | |
|---|---|---|
| FirstAsyncTSource(IMongoQueryableTSource, CancellationToken) | 
            Returns the first element of a sequence.
              | |
| FirstAsyncTSource(IMongoQueryableTSource, ExpressionFuncTSource, Boolean, CancellationToken) | 
            Returns the first element of a sequence that satisfies a specified condition.
              |