Activator.CreateInstance Method (Type, BindingFlags, Binder, Object, CultureInfo)
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, 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.
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.
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 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 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 3.5 or later.
for the ability to call unmanaged code when creating an instance of a delegate. Associated enumeration: SecurityPermissionFlag.UnmanagedCode
for accessing nonpublic types and members when the grant set of the nonpublic types and members is restricted to the caller's grant set or to a subset thereof. Associated enumeration: ReflectionPermissionFlag.RestrictedMemberAccess
for accessing nonpublic types and members regardless of their grant set. Associated enumeration: ReflectionPermissionFlag.MemberAccess