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AppDomain.CreateInstance Method (String, String)

Creates a new instance of the specified type defined in the specified assembly.

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

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

Parameters

assemblyName

The display name of the assembly. See Assembly.FullName.

typeName

The fully qualified name of the requested type, including the namespace but not the assembly, as returned by the Type.FullName property.

Return Value

An object that is a wrapper for the new instance specified by typeName. The return value needs to be unwrapped to access the real object.

Exception typeCondition

AppDomainUnloadedException

The operation is attempted on an unloaded application domain.

ArgumentNullException

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

BadImageFormatException

assemblyName is not a valid assembly.

-or-

Version 2.0 or later of the common language runtime is currently loaded and assemblyName was compiled with a later version.

FileLoadException

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

FileNotFoundException

assemblyName was not found.

MethodAccessException

The caller does not have permission to call this constructor.

MissingMethodException

No matching public constructor was found.

TypeLoadException

typename was not found in assemblyName.

NullReferenceException

This instance is a null reference (Nothing in Visual Basic).

This method calls the default constructor for typeName.

See AssemblyName for the format of assemblyName.

An attempt to call CreateInstance on a target application domain that is not the current application domain will result in a successful load of the assembly in the target application domain. Since an Assembly is not MarshalByRefObject, when this method attempts to return the Assembly for the loaded assembly to the current application domain, the common language runtime will try to load the assembly into the current application domain and the load might fail. The assembly that is loaded into the current application domain might be different from the assembly that was loaded first if the path settings for the two application domains are different.

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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