MemoryStream.WriteAsync Method (Byte, Int32, Int32, CancellationToken)
Asynchronously writes a sequence of bytes to the current stream, advances the current position within this stream by the number of bytes written, and monitors cancellation requests.
Assembly: mscorlib (in mscorlib.dll)
[<ComVisibleAttribute(false)>] [<HostProtectionAttribute(SecurityAction.LinkDemand, ExternalThreading = true)>] abstract WriteAsync : buffer:byte * offset:int * count:int * cancellationToken:CancellationToken -> Task [<ComVisibleAttribute(false)>] [<HostProtectionAttribute(SecurityAction.LinkDemand, ExternalThreading = true)>] override WriteAsync : buffer:byte * offset:int * count:int * cancellationToken:CancellationToken -> Task
- Type: System.Byte
The buffer to write data from.
- Type: System.Int32
The zero-based byte offset in buffer from which to begin copying bytes to the stream.
- Type: System.Int32
The maximum number of bytes to write.
Return ValueType: System.Threading.Tasks.Task
A task that represents the asynchronous write operation.
buffer is a null reference (Nothing in Visual Basic).
offset or count is negative.
The sum of offset and count is larger than the buffer length.
The stream does not support writing.
The stream has been disposed.
The stream is currently in use by a previous write operation.
The HostProtectionAttribute attribute applied to this type or member has the following Resources property value: ExternalThreading. The HostProtectionAttribute does not affect desktop applications (which are typically started by double-clicking an icon, typing a command, or entering a URL in a browser). For more information, see the HostProtectionAttribute class or SQL Server Programming and Host Protection Attributes.
Windows Phone 8.1, Windows Phone 8, Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)
The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.