Sys Namespace

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Name Description
Application Provides members that support client-component development.
ApplicationLoadEventArgs Provides a specialized event arguments collection for the Load event of the class.
Browser Contains information about the browser.
CancelEventArgs Used by event sources that enable the handler to cancel the operation in progress.
Component Provides the base class for the and classes, and for any other object whose lifetime should be managed by Microsoft ASP.NET AJAX.
CultureInfo Represents a culture definition that can be applied to other objects that accept a culture-related setting.
Debug Provides debugging and tracing functionality for client code. This is a static class that is invoked directly without creating an instance of the class.
EventArgs Used by event sources to pass event argument information.
EventHandlerList Creates a dictionary to hold client-script events and their associated handlers.
HistoryEventArgs This class is used by the Sys.Application class to hold event arguments for the Navigate event.
PropertyChangedEventArgs Describes property changes.
StringBuilder Provides an optimized mechanism to concatenate strings.


Name Description
EventHandler Delegate for handling generic events.
PropertyChangedEventHandler Delegate for the event.


Name Description
IContainer Provides a common interface for all components that can contain other components.
IDisposable Provides a common interface for application-defined tasks associated with closing, releasing, or resetting resources held by instances of a registered Microsoft AJAX Library class.
INotifyDisposing Defines the Disposing event.
INotifyPropertyChange Defines the PropertyChanged event.
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