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FileStream.BeginWrite Method

Begins an asynchronous write.

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

[SecuritySafeCriticalAttribute]
public override IAsyncResult BeginWrite(
	byte[] array,
	int offset,
	int numBytes,
	AsyncCallback userCallback,
	Object stateObject
)

Parameters

array
Type: System.Byte[]
The buffer containing data to write to the current stream.
offset
Type: System.Int32
The zero-based byte offset in array at which to begin copying bytes to the current stream.
numBytes
Type: System.Int32
The maximum number of bytes to write.
userCallback
Type: System.AsyncCallback
The method to be called when the asynchronous write operation is completed.
stateObject
Type: System.Object
A user-provided object that distinguishes this particular asynchronous write request from other requests.

Return Value

Type: System.IAsyncResult
An IAsyncResult that references the asynchronous write.

ExceptionCondition
ArgumentException

array length minus offset is less than numBytes.

ArgumentNullException

array is null.

ArgumentOutOfRangeException

offset or numBytes is negative.

NotSupportedException

The stream does not support writing.

ObjectDisposedException

The stream is closed.

IOException

An I/O error occurs.

Silverlight

Supported in: 5, 4, 3

Silverlight for Windows Phone

Supported in: Windows Phone OS 7.1, Windows Phone OS 7.0

XNA Framework

Supported in: Xbox 360, Windows Phone OS 7.0

For a list of the operating systems and browsers that are supported by Silverlight, see Supported Operating Systems and Browsers.

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