Activator.CreateInstance Method (Type, Object[])
Creates an instance of the specified type using the constructor that best matches the specified parameters.
Namespace: System
Assembly: mscorlib (in mscorlib.dll)
Parameters
- type
- Type: System.Type
The type of object to create.
- args
- 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.
| Exception | Condition | ||
|---|---|---|---|
| ArgumentNullException | type is null. | ||
| ArgumentException | type is not a RuntimeType. -or- type is an open generic type (that is, the ContainsGenericParameters property returns true). | ||
| NotSupportedException | type cannot be a TypeBuilder. -or- Creation of TypedReference, ArgIterator, Void, and RuntimeArgumentHandle types, or arrays of those types, is not supported. -or- The assembly that contains type is a dynamic assembly that was created with AssemblyBuilderAccess.Save. -or- The constructor that best matches args has varargs arguments. | ||
| TargetInvocationException | The constructor being called throws an exception. | ||
| MethodAccessException |
The caller does not have permission to call this constructor. | ||
| MemberAccessException | Cannot create an instance of an abstract class, or this member was invoked with a late-binding mechanism. | ||
| InvalidComObjectException | The COM type was not obtained through GetTypeFromProgID or GetTypeFromCLSID. | ||
| MissingMethodException |
No matching public constructor was found. | ||
| COMException | type is a COM object but the class identifier used to obtain the type is invalid, or the identified class is not registered. | ||
| TypeLoadException | 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.
 Note |
|---|
Starting with the .NET Framework 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 3.5 or later. |
- SecurityPermission
for the ability to call unmanaged code when creating an instance of a delegate. Associated enumeration: SecurityPermissionFlag.UnmanagedCode
- ReflectionPermission
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
- ReflectionPermission
for accessing nonpublic types regardless of their grant set. Associated enumeration: ReflectionPermissionFlag.MemberAccess
Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)
The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.
