Activator.CreateInstance Method (String, String, Object[])

ActivatorCreateInstance Method (String, String, Object)

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

Namespace: System
Assembly: mscorlib (in mscorlib.dll) Version: 4.0.0.0

Syntax

public static ObjectHandle CreateInstance(
	string assemblyName,
	string typeName,
	Object[] activationAttributes
)

assemblyName: Type: SystemString
The name of the assembly where the type named typeName is sought. If assemblyName is null, the executing assembly is searched.
typeName: Type: SystemString
The name of the preferred type.
activationAttributes: Type: SystemObject
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: ObjectHandle
A handle that must be unwrapped to access the newly created instance.

Exceptions

Exception	Condition
ArgumentNullException	typeName is null.
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	Cannot create an instance of an abstract class, or this member was invoked with a late-binding mechanism.
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.-or- activationAttributes is not an empty array, and the type being created does not derive from MarshalByRefObject.-or-activationAttributes is not a UrlAttributearray.
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.
TargetInvocationException	An error occurred when attempting remote activation in a target specified in activationAttributes.