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Activator.CreateInstance Method (AppDomain, String, String)

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

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

public static ObjectHandle CreateInstance(
	AppDomain domain,
	string assemblyName,
	string typeName
)

Parameters

domain
Type: System.AppDomain

The remote domain where the type named typeName is created.

assemblyName
Type: System.String

The name of the assembly where the type named typeName is sought. If assemblyName is null, the executing assembly is searched.

typeName
Type: System.String

The fully qualified name of the preferred type.

Return Value

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

ExceptionCondition
ArgumentNullException

typeName or domain 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 type.

-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.

-or-

The assembly name or code base is invalid.

Use CreateInstance when a host needs to execute code in an application domain that has restricted security permissions.

Use ObjectHandle.Unwrap to unwrap the return value.

NoteNote

This method uses SecurityAction.LinkDemand to require the immediate caller to have full trust. For important limitations on using the LinkDemand member, see Demand vs. LinkDemand.

.NET Framework

Supported in: 4.5.2, 4.5.1, 4.5, 4, 3.5, 3.0, 2.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

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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