Application.Application Constructor

Initializes a new instance of the Application class.

Namespace: System.Windows
Assembly: PresentationFramework (in presentationframework.dll)

public Application ()
public Application ()
public function Application ()
You cannot use constructors in XAML.

Exception typeCondition

InvalidOperationException

More than one instance of the Application class is created per AppDomain.

Only one instance of the Application class can be created per AppDomain, to ensure shared access to a single set of application-scope window, property, and resource data. Consequently, the default constructor of the Application class detects whether the instance being initialized is the first instance in an AppDomain and, if not, raises the InvalidOperationException.

The Application object for the current AppDomain is exposed from the static Current property.

Windows 98, Windows Server 2000 SP4, Windows CE, Windows Millennium Edition, Windows Mobile for Pocket PC, Windows Mobile for Smartphone, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

The Microsoft .NET Framework 3.0 is supported on Windows Vista, Microsoft Windows XP SP2, and Windows Server 2003 SP1.

.NET Framework

Supported in: 3.0

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