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AppDomain.CreateInstance Method (String, String, Boolean, BindingFlags, Binder, Object[], CultureInfo, Object[], Evidence)

.NET Framework 1.1

Creates a new instance of the specified type defined in the specified assembly. Parameters specify a binder, binding flags, constructor arguments, culture-specific information used to interpret arguments, activation attributes, and authorization to create the type.

[Visual Basic]
Overloads Public Overridable Function CreateInstance( _
   ByVal assemblyName As String, _
   ByVal typeName As String, _
   ByVal ignoreCase As Boolean, _
   ByVal bindingAttr As BindingFlags, _
   ByVal binder As Binder, _
   ByVal args() As Object, _
   ByVal culture As CultureInfo, _
   ByVal activationAttributes() As Object, _
   ByVal securityAttributes As Evidence _
) As ObjectHandle Implements _AppDomain.CreateInstance
public virtual ObjectHandle CreateInstance(
 string assemblyName,
 string typeName,
 bool ignoreCase,
 BindingFlags bindingAttr,
 Binder binder,
 object[] args,
 CultureInfo culture,
 object[] activationAttributes,
 Evidence securityAttributes
public: virtual ObjectHandle* CreateInstance(
 String* assemblyName,
 String* typeName,
 bool ignoreCase,
 BindingFlags bindingAttr,
 Binder* binder,
 Object* args __gc[],
 CultureInfo* culture,
 Object* activationAttributes __gc[],
 Evidence* securityAttributes
public function CreateInstance(
   assemblyName : String,
 typeName : String,
 ignoreCase : Boolean,
 bindingAttr : BindingFlags,
 binder : Binder,
 args : Object[],
 culture : CultureInfo,
 activationAttributes : Object[],
 securityAttributes : Evidence
) : ObjectHandle;


The display name of the assembly.
The fully-qualified name of the requested type.
A Boolean value specifying whether to perform a case-sensitive search or not.
A combination of zero or more bit flags that affect the search for the typeName constructor. If bindingAttr is zero, a case-sensitive search for public constructors is conducted.
An object that enables the binding, coercion of argument types, invocation of members, and retrieval of MemberInfo objects using reflection. If binder is null, the default binder is used.
The arguments to pass to the constructor. This array of arguments must match in number, order, and type the parameters of the constructor to invoke. If the default constructor is preferred, args must be an empty array or null.
Culture-specific information that governs the coercion of args to the formal types declared for the typeName constructor. If culture is a null reference (Nothing in Visual Basic), the CultureInfo for the current thread is used.
One or more attributes that can participate in activation.
Information used to authorize creation of typeName.

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 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 permissions 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