CreateInstance Method (Type, BindingFlags, Binder, Object[], CultureInfo)

Activator.CreateInstance Method (Type, BindingFlags, Binder, Object[], CultureInfo)

Creates an instance of the specified type using the constructor that best matches the specified parameters.

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

public static Object CreateInstance(
	Type type,
	BindingFlags bindingAttr,
	Binder binder,
	Object[] args,
	CultureInfo culture


Type: System.Type
The type of object to create.
Type: System.Reflection.BindingFlags
A combination of zero or more bit flags that affect the search for the type constructor. If bindingAttr is zero, a case-sensitive search for public constructors is conducted.
Type: System.Reflection.Binder
An object that uses bindingAttr and args to seek and identify the type constructor. If binder is null, the default binder is used.
Type: System.Object[]
An array of arguments that match in number, order, and type the parameters of the constructor to invoke. If args is an empty array or null, the constructor that takes no parameters (the default constructor) is invoked.
Type: System.Globalization.CultureInfo
Culture-specific information that governs the coercion of args to the formal types declared for the type constructor. If culture is null, the CultureInfo for the current thread is used.

Return Value

Type: System.Object
A reference to the newly created object.


type is null.


type is not a RuntimeType.


type is an open generic type (that is, the ContainsGenericParameters property returns true).


type cannot be a TypeBuilder.


Creation of TypedReference, ArgIterator, Void, and RuntimeArgumentHandle types, or arrays of those types, is not supported.


The assembly that contains type is a dynamic assembly that was created with AssemblyBuilderAccess.Save.


The constructor that best matches args has varargs arguments.


The constructor being called throws an exception.


The caller does not have permission to call this constructor.


Cannot create an instance of an abstract class, or this member was invoked with a late-binding mechanism.


The COM type was not obtained through GetTypeFromProgID or GetTypeFromCLSID.


No matching constructor was found.


type is a COM object but the class identifier used to obtain the type is invalid, or the identified class is not registered.


type is not a valid type.

The constructor to be invoked must provide the most specific match with the specified argument list under the constraints of the specified binder and binding attributes.


Starting with the .NET Framework version 2.0 Service Pack 1, this method can be used to access nonpublic types and members if the caller has been granted ReflectionPermission with the ReflectionPermissionFlag.RestrictedMemberAccess flag and if the grant set of the assembly that contains the nonpublic types and members is restricted to the caller’s grant set or to a subset thereof. (See Security Considerations for Reflection.)

To use this functionality, your application should target the .NET Framework version 3.5 or later.

.NET Framework

Supported in: 4, 3.5, 3.0, 2.0, 1.1, 1.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows XP SP2 x64 Edition, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

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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