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IsolatedStorageFileStream.BeginRead Method

Begins an asynchronous read.

Namespace: System.IO.IsolatedStorage
Assembly: mscorlib (in mscorlib.dll)

public override IAsyncResult BeginRead (
	byte[] buffer,
	int offset,
	int numBytes,
	AsyncCallback userCallback,
	Object stateObject
)
public IAsyncResult BeginRead (
	byte[] buffer, 
	int offset, 
	int numBytes, 
	AsyncCallback userCallback, 
	Object stateObject
)
public override function BeginRead (
	buffer : byte[], 
	offset : int, 
	numBytes : int, 
	userCallback : AsyncCallback, 
	stateObject : Object
) : IAsyncResult

Parameters

buffer

The buffer to read data into.

offset

The byte offset in buffer at which to begin reading.

numBytes

The maximum number of bytes to read.

userCallback

The method to call when the asynchronous read operation is completed. This parameter is optional.

stateObject

The status of the asynchronous read.

Return Value

An IAsyncResult object that represents the asynchronous read, which is possibly still pending. This IAsyncResult must be passed to this stream's EndRead method to determine how many bytes were read. This can be done either by the same code that called BeginRead or in a callback passed to BeginRead.

Exception typeCondition

IOException

An asynchronous read was attempted past the end of the file.

The current position in the stream is updated when you issue the asynchronous read or write, not when the I/O operation completes.

You must call EndRead with this IAsyncResult to find out how many bytes were read.

Windows 98, Windows 2000 SP4, Windows Millennium Edition, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see System Requirements.

.NET Framework

Supported in: 2.0, 1.1, 1.0

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