MemoryStream.CopyToAsync Method (Stream, Int32, CancellationToken)
Asynchronously reads all the bytes from the current stream and writes them to another stream, using a specified buffer size and cancellation token.
Assembly: mscorlib (in mscorlib.dll)
public override Task CopyToAsync( Stream destination, int bufferSize, CancellationToken cancellationToken )
- Type: System.IO.Stream
The stream to which the contents of the current stream will be copied.
- Type: System.Int32
The size, in bytes, of the buffer. This value must be greater than zero.
- Type: System.Threading.CancellationToken
The token to monitor for cancellation requests.
Return ValueType: System.Threading.Tasks.Task
A task that represents the asynchronous copy operation.
destination is null.
buffersize is negative or zero.
Either the current stream or the destination stream is disposed.
The current stream does not support reading, or the destination stream does not support writing.
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.