System.Reflection.ConstructorInfo.Invoke Method

Invokes the constructor reflected by the instance that has the specified parameters, providing default values for the parameters not commonly used.

Syntax

[System.Diagnostics.DebuggerStepThrough]
public object Invoke (object[] parameters)

Parameters

parameters
An array of values that matches the number, order and type (under the constraints of the default binder) of the parameters for this constructor. If this constructor takes no parameters, then use either an array with zero elements or null, as in Object[] parameters = new Object[0]. Any object in this array that is not explicitly initialized with a value will contain the default value for that object type. For reference-type elements, this value is null. For value-type elements, this value is 0, 0.0, or false, depending on the specific element type.

Returns

An instance of the class associated with the constructor.

Exceptions

TypeReason
ArgumentExceptionThe types of the elements of parameters do not match the types of the parameters accepted by the constructor reflected by the current instance, under the constraints of the default binder.
MethodAccessExceptionThe caller does not have the required permissions.
System.Reflection.TargetInvocationExceptionThe constructor reflected by the current instance threw an exception.
System.Reflection.TargetParameterCountException parameters.Length does not equal the number of parameters required by the contract of the constructor reflected by the current instance.

Remarks

The number, type, and order of elements in the parameters array should be identical to the number, type, and order of parameters for the constructor reflected by this instance. Before calling the constructor, Invoke ensures that the caller has access permission and verifies that the parameters are valid.

Access restrictions are ignored for fully trusted code. That is, private constructors, methods, fields, and properties can be accessed and invoked using reflection whenever the code is fully trusted.

Note:

To create an instance of a value type that has no instance constructors, use the Activator.CreateInstance(Type) method.

This method is a convenience method for the following overloaded version, using default values. This method cannot be overridden.

Note:

Starting with the net_v20sp1_long, this method can be used to access non-public members if the caller has been granted System.Security.Permissions.ReflectionPermission with the System.Security.Permissions.ReflectionPermissionFlag.RestrictedMemberAccess flag and if the grant set of the non-public members is restricted to the caller’s grant set, or a subset thereof. (See Security Considerations for Reflection.)

To use this functionality, your application should target the net_v35_long or later.

Permissions

TypeReason
System.Security.Permissions.ReflectionPermissionRequires permission to invoke non-public members of loaded assemblies. See System.Security.Permissions.ReflectionPermissionFlag.MemberAccess.

Requirements

Namespace: System.Reflection
Assembly: mscorlib (in mscorlib.dll)
Assembly Versions: 1.0.5000.0, 2.0.0.0, 4.0.0.0