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Stream.AsyncRead Extension Method (F#)

Returns an asynchronous computation that will read from the stream into the given buffer.

Namespace/Module Path: Microsoft.FSharp.Control.CommonExtensions

Assembly: FSharp.Core (in FSharp.Core.dll)

// Signatures:
type System.IO.Stream with
  member AsyncRead : byte [] * ?int * ?int -> Async<int>
type System.IO.Stream with
  member AsyncRead : int -> Async<byte []>

// Usage:
stream.AsyncRead (buffer)
stream.AsyncRead (count)


Type: byte[]

The buffer to read into.


Type: int

An optional offset as a number of bytes in the stream.


Type: int

An optional number of bytes to read from the stream.




Thrown when the sum of offset and count is longer than the buffer length.


Thrown when offset or count is negative.

This member is named AsyncRead in compiled assemblies. If you are accessing the method from a language other than F#, or through reflection, use this name.

Windows 8, Windows 7, Windows Server 2012, Windows Server 2008 R2

F# Core Library Versions

Supported in: 2.0

© 2015 Microsoft