| IMongoClientExtensionsWatchAsync Method (IMongoClient, IClientSessionHandle, ChangeStreamOptions, CancellationToken) | 
 
            Watches changes on all collections in all databases.
            
 
    Namespace: 
   MongoDB.Driver
    Assembly:
   MongoDB.Driver (in MongoDB.Driver.dll) Version: 2.12.2+a4a3888f4fb51bb518b1eb5002effc2d47f2ea6a
 Syntax
Syntaxpublic static Task<IChangeStreamCursor<ChangeStreamDocument<BsonDocument>>> WatchAsync(
	this IMongoClient client,
	IClientSessionHandle session,
	ChangeStreamOptions options = null,
	CancellationToken cancellationToken = null
)
<ExtensionAttribute>
Public Shared Function WatchAsync ( 
	client As IMongoClient,
	session As IClientSessionHandle,
	Optional options As ChangeStreamOptions = Nothing,
	Optional cancellationToken As CancellationToken = Nothing
) As Task(Of IChangeStreamCursor(Of ChangeStreamDocument(Of BsonDocument)))
[<ExtensionAttribute>]
static member WatchAsync : 
        client : IMongoClient * 
        session : IClientSessionHandle * 
        ?options : ChangeStreamOptions * 
        ?cancellationToken : CancellationToken 
(* Defaults:
        let _options = defaultArg options null
        let _cancellationToken = defaultArg cancellationToken null
*)
-> Task<IChangeStreamCursor<ChangeStreamDocument<BsonDocument>>> 
Parameters
- client
- Type: MongoDB.DriverIMongoClient
 The client.
- session
- Type: MongoDB.DriverIClientSessionHandle
 The session.
- options (Optional)
- Type: MongoDB.DriverChangeStreamOptions
 The options.
- cancellationToken (Optional)
- Type: System.ThreadingCancellationToken
 The cancellation token.
Return Value
Type: 
TaskIChangeStreamCursorChangeStreamDocumentBsonDocument
            A change stream.
            
Usage Note
In Visual Basic and C#, you can call this method as an instance method on any object of type 
IMongoClient. When you use instance method syntax to call this method, omit the first parameter. For more information, see 
Extension Methods (Visual Basic) or 
Extension Methods (C# Programming Guide).
 See Also
See Also