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Activator.CreateInstance Method (String, String)

Creates an instance of the type whose name is specified, using the named assembly and default constructor.

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

public static ObjectHandle CreateInstance (
	string assemblyName,
	string typeName
)
public static ObjectHandle CreateInstance (
	String assemblyName, 
	String typeName
)
public static function CreateInstance (
	assemblyName : String, 
	typeName : String
) : ObjectHandle
Not applicable.

Parameters

assemblyName

The name of the assembly where the type named typeName is sought. If assemblyName is a null reference (Nothing in Visual Basic), the executing assembly is searched.

typeName

The name of the preferred type.

Return Value

A handle that must be unwrapped to access the newly created instance.

Exception typeCondition

ArgumentNullException

typeName is a null reference (Nothing in Visual Basic).

MissingMethodException

No matching public constructor was found.

TypeLoadException

typename was not found in assemblyName.

FileNotFoundException

assemblyName was not found.

MethodAccessException

The caller does not have permission to call this constructor.

MemberAccessException

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

TargetInvocationException

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

InvalidComObjectException

The COM type was not obtained through GetTypeFromProgID or GetTypeFromCLSID.

NotSupportedException

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

BadImageFormatException

assemblyName is not a valid assembly.

-or-

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.

FileLoadException

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

Use ObjectHandle.Unwrap to unwrap the return value.

NoteNote:

Starting with the , this method can be used to create nonpublic types if the caller has been granted ReflectionPermission with the ReflectionPermissionFlag.ReflectionEmit flag and if the grant set of the assembly that contains the nonpublic types 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 . For more information, see The .NET Framework 3.5 Architecture.

Windows 98, Windows Server 2000 SP4, Windows Millennium Edition, 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, 2.0, 1.1, 1.0

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