Articolo
11/18/2011

Overlapped Class

Microsoft Silverlight will reach end of support after October 2021. Learn more.

Provides a managed representation of a Win32 OVERLAPPED structure, including methods to transfer information from an Overlapped instance to a NativeOverlapped structure.

Inheritance Hierarchy

System.Object
System.Threading.Overlapped

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

Syntax

'Declaration
<ComVisibleAttribute(True)> _
Public Class Overlapped

[ComVisibleAttribute(true)]
public class Overlapped

The Overlapped type exposes the following members.

Constructors

	Name	Description
	Overlapped	Initializes a new, empty instance of the Overlapped class.

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Properties

	Name	Description
	AsyncResult	Gets or sets the object that provides status information on the I/O operation.
	OffsetHigh	Gets or sets the high-order word of the file position at which to start the transfer. The file position is a byte offset from the start of the file.
	OffsetLow	Gets or sets the low-order word of the file position at which to start the transfer. The file position is a byte offset from the start of the file.

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Methods

	Name	Description
	Equals(Object)	Determines whether the specified Object is equal to the current Object. (Inherited from Object.)
	Finalize	Allows an object to try to free resources and perform other cleanup operations before the Object is reclaimed by garbage collection. (Inherited from Object.)
	GetHashCode	Serves as a hash function for a particular type. (Inherited from Object.)
	GetType	Gets the Type of the current instance. (Inherited from Object.)
	MemberwiseClone	Creates a shallow copy of the current Object. (Inherited from Object.)
	ToString	Returns a string that represents the current object. (Inherited from Object.)

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Remarks

Note:
This type is used by the .NET Framework for Silverlight. It cannot be used in Silverlight-based applications.

The Pack method transfers information from an Overlapped object to a NativeOverlapped structure that can be passed to Win32 API functions for asynchronous file I/O. The Unpack method transfers information from a NativeOverlapped structure to an instance of the Overlapped class.

Changes to the properties of an Overlapped object affect its associated NativeOverlapped structure, and vice versa.

Version Information

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

Platforms

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

Thread Safety

Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.

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