NetworkChange Class
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Allows applications to receive notification when the Internet Protocol (IP) address of a network interface, also called a network card or adapter, changes.
Inheritance Hierarchy
System.Object
System.Net.NetworkInformation.NetworkChange
Namespace: System.Net.NetworkInformation
Assembly: System.Net (in System.Net.dll)
Syntax
'Declaration
Public MustInherit Class NetworkChange
public abstract class NetworkChange
The NetworkChange type exposes the following members.
Constructors
| Name | Description | |
|---|---|---|
.gif "Protected method") .gif "Supported by Silverlight for Windows Phone") |
NetworkChange | Initializes a new instance of the NetworkChange class. |
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Methods
| Name | Description | |
|---|---|---|
.gif "Public method") |
Equals(Object) | Determines whether the specified Object is equal to the current Object. (Inherited from Object.) |
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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.) |
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GetHashCode | Serves as a hash function for a particular type. (Inherited from Object.) |
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GetType | Gets the Type of the current instance. (Inherited from Object.) |
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MemberwiseClone | Creates a shallow copy of the current Object. (Inherited from Object.) |
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ToString | Returns a string that represents the current object. (Inherited from Object.) |
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Events
| Name | Description | |
|---|---|---|
.gif "Public event") .gif "Static member") |
NetworkAddressChanged | Occurs when the IP address of a network interface changes. |
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Remarks
The NetworkChange class provides address change notification by raising NetworkAddressChanged events. An interface address can change for many reasons, such as a disconnected network cable, moving out of range of a wireless Local Area Network, or hardware failure.
To receive notification, you must identify your application's event handlers, which are one or more methods that perform your application-specific tasks each time the event is raised. To have a NetworkChange object call your event-handling methods when a NetworkAddressChanged event occurs, you must associate the methods with a NetworkAddressChangedEventHandler delegate, and add this delegate to the event.
This class is used to enable basic detection of changes in network state, such as address or interface state changes. The resulting capabilities allow applications to maintain internal application state to optimize whether to make remote network calls or to retrieve data from a local content cache, a core requirement to enable offline application scenarios.
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: 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.