CreateInstance Method (String, String, Boolean, BindingFlags, Binder, Object[], CultureInfo, Object[], Evidence)

Activator.CreateInstance Method (String, String, Boolean, BindingFlags, Binder, Object(), CultureInfo, Object(), Evidence)

Note: This API is now obsolete. The non-obsolete alternative is CreateInstance(String, String, Boolean, BindingFlags, Binder, Object(), CultureInfo, Object()).

Creates an instance of the type whose name is specified, using the named assembly and the constructor that best matches the specified parameters.

Namespace:  System
Assembly:  mscorlib (in mscorlib.dll)

<ObsoleteAttribute("Methods which use evidence to sandbox are obsolete and will be removed in a future release of the .NET Framework. Please use an overload of CreateInstance which does not take an Evidence parameter. See for more information.")> _
Public Shared Function CreateInstance ( _
	assemblyName As String, _
	typeName As String, _
	ignoreCase As Boolean, _
	bindingAttr As BindingFlags, _
	binder As Binder, _
	args As Object(), _
	culture As CultureInfo, _
	activationAttributes As Object(), _
	securityInfo As Evidence _
) As ObjectHandle


Type: System.String
The name of the assembly where the type named typeName is sought. If assemblyName is Nothing, the executing assembly is searched.
Type: System.String
The name of the preferred type.
Type: System.Boolean
true to specify that the search for typeName is not case-sensitive; false to specify that the search is case-sensitive.
Type: System.Reflection.BindingFlags
A combination of zero or more bit flags that affect the search for the typeName constructor. If bindingAttr is zero, a case-sensitive search for public constructors is conducted.
Type: System.Reflection.Binder
An object that uses bindingAttr and args to seek and identify the typeName constructor. If binder is Nothing, the default binder is used.
Type: System.Object()
An array of arguments that match in number, order, and type the parameters of the constructor to invoke. If args is an empty array or Nothing, the constructor that takes no parameters (the default constructor) is invoked.
Type: System.Globalization.CultureInfo
Culture-specific information that governs the coercion of args to the formal types declared for the typeName constructor. If culture is Nothing, the CultureInfo for the current thread is used.
Type: System.Object()
An array of one or more attributes that can participate in activation. This is typically an array that contains a single UrlAttribute object. The UrlAttribute specifies the URL that is required to activate a remote object.
Type: System.Security.Policy.Evidence
Information used to make security policy decisions and grant code permissions.

Return Value

Type: System.Runtime.Remoting.ObjectHandle
A handle that must be unwrapped to access the newly created instance.


typeName is Nothing.


No matching constructor was found.


typename was not found in assemblyName.


assemblyName was not found.


The caller does not have permission to call this constructor.


Cannot create an instance of an abstract class, or this member was invoked with a late-binding mechanism.


The constructor, which was invoked through reflection, threw an exception.


The COM type was not obtained through GetTypeFromProgID or GetTypeFromCLSID.


Creation of TypedReference, ArgIterator, Void, and RuntimeArgumentHandle types, or arrays of those types, is not supported.


activationAttributes is not an empty array, and the type being created does not derive from MarshalByRefObject.


The constructor that best matches args has varargs arguments.


assemblyName is not a valid assembly.


The common language runtime (CLR) version 2.0 or later is currently loaded, and assemblyName was compiled for a version of the CLR that is later than the currently loaded version. Note that the .NET Framework versions 2.0, 3.0, and 3.5 all use CLR version 2.0.


An assembly or module was loaded twice with two different evidences.

Use ObjectHandle.Unwrap to unwrap the return value.

The activationAttributes parameter is related to client-activated objects; see Client Activation.


Starting with the .NET Framework version 2.0 Service Pack 1, this method can be used to create nonpublic types and members if the caller has been granted ReflectionPermission with the ReflectionPermissionFlag.RestrictedMemberAccess flag and if the grant set of the assembly that contains the nonpublic types and members is restricted to the caller’s grant set or to a subset thereof. (See Security Considerations for Reflection.)

To use this functionality, your application should target the .NET Framework version 3.5 or later.

.NET Framework

Supported in: 3.5, 3.0, 2.0, 1.1, 1.0
Obsolete (compiler warning) in 4

.NET Framework Client Profile

Supported in: 3.5 SP1
Obsolete (compiler warning) in 4

Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows XP SP2 x64 Edition, 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.

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