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

.NET Framework 1.1

Creates a new instance of the specified type defined in the specified assembly. A parameter specifies an array of activation attributes.

[Visual Basic]
Overloads Public Overridable Function CreateInstance( _
   ByVal assemblyName As String, _
   ByVal typeName As String, _
   ByVal activationAttributes() As Object _
) As ObjectHandle Implements _AppDomain.CreateInstance
public virtual ObjectHandle CreateInstance(
 string assemblyName,
 string typeName,
 object[] activationAttributes
public: virtual ObjectHandle* CreateInstance(
 String* assemblyName,
 String* typeName,
 Object* activationAttributes __gc[]
public function CreateInstance(
   assemblyName : String,
 typeName : String,
 activationAttributes : Object[]
) : ObjectHandle;


The display name of the assembly.
The fully-qualified name of the requested type.
One or more attributes that can participate in activation.

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 Type Condition
ArgumentNullException assemblyName or 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.
NotSupportedException The caller cannot provide activation attributes for an object that does not inherit from MarshalByRefObject.
SecurityException The caller does not have the correct permissions. See the requirements section.
AppDomainUnloadedException Operations are attempted on an unloaded application domain.


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.


Platforms: Windows 98, Windows NT 4.0, Windows Millennium Edition, Windows 2000, Windows XP Home Edition, Windows XP Professional, Windows Server 2003 family

.NET Framework Security: 

See Also

AppDomain Class | AppDomain Members | System Namespace | AppDomain.CreateInstance Overload List | Activator.CreateInstance