Initializes a new instance of the Application class.
Assembly: PresentationFramework (in PresentationFramework.dll)
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; if it is not, an InvalidOperationException is thrown.
Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2
The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.