Activator.CreateInstance Method (Type, Object, Object)
Creates an instance of the specified type using the constructor that best matches the specified parameters.
Assembly: mscorlib (in mscorlib.dll)
public static Object CreateInstance( Type type, Object args, Object activationAttributes )
- Type: System.Type
The type of object to create.
- 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.
Return ValueType: 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.
activationAttributes is not an empty array, and the type being created does not derive from MarshalByRefObject.
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.
No matching public 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 be accessible and must provide the most specific match with the specified argument list.
The activationAttributes parameter is related to client-activated objects; see Client Activation.
Starting with the .NET Framework version 2.0 Service Pack 1, this method can be used to access nonpublic types 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 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.
for the ability to call unmanaged code when creating an instance of a delegate. Associated enumeration: SecurityPermissionFlag.UnmanagedCode
for accessing a nonpublic type when the grant set of the nonpublic type is restricted to the caller's grant set or to a subset thereof. Associated enumeration: ReflectionPermissionFlag.RestrictedMemberAccess
for accessing nonpublic types regardless of their grant set. Associated enumeration: ReflectionPermissionFlag.MemberAccess
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.