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ApplicationManager.CreateObject Method (String, Type, String, String, Boolean, Boolean)

Creates an object for the specified application domain based on type, virtual and physical paths, a Boolean value indicating failure behavior when an object of the specified type already exists, and a Boolean value indicating whether hosting initialization error exceptions are thrown.

Namespace:  System.Web.Hosting
Assembly:  System.Web (in System.Web.dll)

[SecurityPermissionAttribute(SecurityAction.Demand, Unrestricted = true)]
[AspNetHostingPermissionAttribute(SecurityAction.LinkDemand, Level = AspNetHostingPermissionLevel.Minimal)]
public IRegisteredObject CreateObject(
	string appId,
	Type type,
	string virtualPath,
	string physicalPath,
	bool failIfExists,
	bool throwOnError


Type: System.String

The unique identifier for the application that owns the object.

Type: System.Type

The type of the object to create.

Type: System.String

The virtual path to the application.

Type: System.String

The physical path to the application.

Type: System.Boolean

true to throw an exception if an object of the specified type is currently registered; false to return the existing registered object of the specified type.

Type: System.Boolean

true to throw exceptions for hosting initialization errors; false to not throw hosting initialization exceptions.

Return Value

Type: System.Web.Hosting.IRegisteredObject
A new object of the specified type.


physicalPath is null

- or -

physicalPath is not a valid application path.

- or -

type does not implement the IRegisteredObject interface.


appID is null.

- or -

type is null.


failIfExists is true and an object of the specified type is already registered.

This overload of the CreateObject method provides the throwOnError parameter, which allows you to control whether hosting initialization exceptions are thrown. The overload of the CreateObject method that does not provide throwOnError calls this overload with the parameter set to false.

Windows 7, Windows Vista, Windows XP SP2, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP Starter Edition, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003, Windows Server 2000 SP4, Windows Millennium Edition, Windows 98

The .NET Framework and .NET Compact Framework do not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

.NET Framework

Supported in: 3.5, 3.0, 2.0