AppDomain.CreateInstance Method

Definition

Creates a new instance of a specified type defined in a specified assembly.

Overloads

CreateInstance(String, String)

Creates a new instance of the specified type defined in the specified assembly.

CreateInstance(String, String, Object[])

Creates a new instance of the specified type defined in the specified assembly. A parameter specifies an array of activation attributes.

CreateInstance(String, String, Boolean, BindingFlags, Binder, Object[], CultureInfo, Object[])

Creates a new instance of the specified type defined in the specified assembly. Parameters specify a binder, binding flags, constructor arguments, culture-specific information used to interpret arguments, and optional activation attributes.

CreateInstance(String, String, Boolean, BindingFlags, Binder, Object[], CultureInfo, Object[], Evidence)

Creates a new instance of the specified type defined in the specified assembly. Parameters specify a binder, binding flags, constructor arguments, culture-specific information used to interpret arguments, activation attributes, and authorization to create the type.

CreateInstance(String, String)

Creates a new instance of the specified type defined in the specified assembly.

public:
 System::Runtime::Remoting::ObjectHandle ^ CreateInstance(System::String ^ assemblyName, System::String ^ typeName);
public:
 virtual System::Runtime::Remoting::ObjectHandle ^ CreateInstance(System::String ^ assemblyName, System::String ^ typeName);
public System.Runtime.Remoting.ObjectHandle? CreateInstance (string assemblyName, string typeName);
public System.Runtime.Remoting.ObjectHandle CreateInstance (string assemblyName, string typeName);
member this.CreateInstance : string * string -> System.Runtime.Remoting.ObjectHandle
abstract member CreateInstance : string * string -> System.Runtime.Remoting.ObjectHandle
override this.CreateInstance : string * string -> System.Runtime.Remoting.ObjectHandle
Public Function CreateInstance (assemblyName As String, typeName As String) As ObjectHandle

Parameters

assemblyName
String

The display name of the assembly. See FullName.

typeName
String

The fully qualified name of the requested type, including the namespace but not the assembly, as returned by the FullName property.

Returns

ObjectHandle

An object that is a wrapper for the new instance specified by typeName. The return value needs to be unwrapped to access the real object.

Implements

Exceptions

The operation is attempted on an unloaded application domain.

assemblyName or typeName is null.

assemblyName is not a valid assembly.

-or-

Version 2.0 or later of the common language runtime is currently loaded and assemblyName was compiled with a later version.

An assembly or module was loaded twice with two different evidences.

assemblyName was not found.

The caller does not have permission to call this constructor.

No matching public constructor was found.

typename was not found in assemblyName.

This instance is null.

Remarks

This method calls the parameterless constructor for typeName.

See AssemblyName for the format of assemblyName.

An attempt to call CreateInstance on a target application domain that is not the current application domain will result in a successful load of the assembly in the target application domain. Since an Assembly is not MarshalByRefObject, when this method attempts to return the Assembly for the loaded assembly to the current application domain, the common language runtime will try to load the assembly into the current application domain and the load might fail. The assembly that is loaded into the current application domain might be different from the assembly that was loaded first if the path settings for the two application domains are different.

See also

CreateInstance(String, String, Object[])

Creates a new instance of the specified type defined in the specified assembly. A parameter specifies an array of activation attributes.

public:
 System::Runtime::Remoting::ObjectHandle ^ CreateInstance(System::String ^ assemblyName, System::String ^ typeName, cli::array <System::Object ^> ^ activationAttributes);
public:
 virtual System::Runtime::Remoting::ObjectHandle ^ CreateInstance(System::String ^ assemblyName, System::String ^ typeName, cli::array <System::Object ^> ^ activationAttributes);
public System.Runtime.Remoting.ObjectHandle? CreateInstance (string assemblyName, string typeName, object[]? activationAttributes);
public System.Runtime.Remoting.ObjectHandle CreateInstance (string assemblyName, string typeName, object[] activationAttributes);
member this.CreateInstance : string * string * obj[] -> System.Runtime.Remoting.ObjectHandle
abstract member CreateInstance : string * string * obj[] -> System.Runtime.Remoting.ObjectHandle
override this.CreateInstance : string * string * obj[] -> System.Runtime.Remoting.ObjectHandle
Public Function CreateInstance (assemblyName As String, typeName As String, activationAttributes As Object()) As ObjectHandle

Parameters

assemblyName
String

The display name of the assembly. See FullName.

typeName
String

The fully qualified name of the requested type, including the namespace but not the assembly, as returned by the FullName property.

activationAttributes
Object[]

An array of one or more attributes that can participate in activation. Typically, an array that contains a single UrlAttribute object that specifies the URL that is required to activate a remote object.

This parameter is related to client-activated objects.Client activation is a legacy technology that is retained for backward compatibility but is not recommended for new development. Distributed applications should instead use Windows Communication Foundation.

Returns

ObjectHandle

An object that is a wrapper for the new instance specified by typeName. The return value needs to be unwrapped to access the real object.

Implements

Exceptions

The operation is attempted on an unloaded application domain.

assemblyName or typeName is null.

assemblyName is not a valid assembly.

-or-

Version 2.0 or later of the common language runtime is currently loaded and assemblyName was compiled with a later version.

An assembly or module was loaded twice with two different evidences.

assemblyName was not found.

The caller does not have permission to call this constructor.

No matching public constructor was found.

The caller cannot provide activation attributes for an object that does not inherit from MarshalByRefObject.

typename was not found in assemblyName.

This instance is null.

Remarks

This method calls the parameterless constructor for typeName.

See AssemblyName for the format of assemblyName.

An attempt to call CreateInstance on a target application domain that is not the current application domain will result in a successful load of the assembly in the target application domain. Since an Assembly is not MarshalByRefObject, when this method attempts to return the Assembly for the loaded assembly to the current application domain, the common language runtime will try to load the assembly into the current application domain and the load might fail. The assembly that is loaded into the current application domain might be different from the assembly that was loaded first if the path settings for the two application domains are different.

See also

CreateInstance(String, String, Boolean, BindingFlags, Binder, Object[], CultureInfo, Object[])

Creates a new instance of the specified type defined in the specified assembly. Parameters specify a binder, binding flags, constructor arguments, culture-specific information used to interpret arguments, and optional activation attributes.

public:
 System::Runtime::Remoting::ObjectHandle ^ CreateInstance(System::String ^ assemblyName, System::String ^ typeName, bool ignoreCase, System::Reflection::BindingFlags bindingAttr, System::Reflection::Binder ^ binder, cli::array <System::Object ^> ^ args, System::Globalization::CultureInfo ^ culture, cli::array <System::Object ^> ^ activationAttributes);
public System.Runtime.Remoting.ObjectHandle CreateInstance (string? assemblyName, string? typeName, bool ignoreCase, System.Reflection.BindingFlags bindingAttr, System.Reflection.Binder binder, object[] args, System.Globalization.CultureInfo culture, object[] activationAttributes);
public System.Runtime.Remoting.ObjectHandle CreateInstance (string assemblyName, string typeName, bool ignoreCase, System.Reflection.BindingFlags bindingAttr, System.Reflection.Binder binder, object[] args, System.Globalization.CultureInfo culture, object[] activationAttributes);
member this.CreateInstance : string * string * bool * System.Reflection.BindingFlags * System.Reflection.Binder * obj[] * System.Globalization.CultureInfo * obj[] -> System.Runtime.Remoting.ObjectHandle
Public Function CreateInstance (assemblyName As String, typeName As String, ignoreCase As Boolean, bindingAttr As BindingFlags, binder As Binder, args As Object(), culture As CultureInfo, activationAttributes As Object()) As ObjectHandle

Parameters

assemblyName
String

The display name of the assembly. See FullName.

typeName
String

The fully qualified name of the requested type, including the namespace but not the assembly, as returned by the FullName property.

ignoreCase
Boolean

A Boolean value specifying whether to perform a case-sensitive search or not.

bindingAttr
BindingFlags

A combination of zero or more bit flags that affect the search for the typeName constructor. If bindingAttr is zero, a case-sensitive search for public constructors is conducted.

binder
Binder

An object that enables the binding, coercion of argument types, invocation of members, and retrieval of MemberInfo objects using reflection. If binder is null, the default binder is used.

args
Object[]

The arguments to pass to the constructor. This array of arguments must match in number, order, and type the parameters of the constructor to invoke. If the parameterless constructor is preferred, args must be an empty array or null.

culture
CultureInfo

Culture-specific information that governs the coercion of args to the formal types declared for the typeName constructor. If culture is null, the CultureInfo for the current thread is used.

activationAttributes
Object[]

An array of one or more attributes that can participate in activation. Typically, an array that contains a single UrlAttribute object that specifies the URL that is required to activate a remote object.

This parameter is related to client-activated objects. Client activation is a legacy technology that is retained for backward compatibility but is not recommended for new development. Distributed applications should instead use Windows Communication Foundation.

Returns

ObjectHandle

An object that is a wrapper for the new instance specified by typeName. The return value needs to be unwrapped to access the real object.

Exceptions

The operation is attempted on an unloaded application domain.

assemblyName or typeName is null.

assemblyName is not a valid assembly.

-or-

assemblyName was compiled with a later version of the common language runtime than the version that is currently loaded.

An assembly or module was loaded twice with two different evidences.

assemblyName was not found.

The caller does not have permission to call this constructor.

No matching constructor was found.

The caller cannot provide activation attributes for an object that does not inherit from MarshalByRefObject.

typename was not found in assemblyName.

This instance is null.

Remarks

See AssemblyName for the format of assemblyName.

An attempt to call CreateInstance on a target application domain that is not the current application domain will result in a successful load of the assembly in the target application domain. Since an Assembly is not MarshalByRefObject, when this method attempts to return the Assembly for the loaded assembly to the current application domain, the common language runtime will try to load the assembly into the current application domain and the load might fail. The assembly that is loaded into the current application domain might be different from the assembly that was loaded first if the path settings for the two application domains are different.

See also

CreateInstance(String, String, Boolean, BindingFlags, Binder, Object[], CultureInfo, Object[], Evidence)

Warning

This API is now obsolete.

Warning

This API is now obsolete.

Creates a new instance of the specified type defined in the specified assembly. Parameters specify a binder, binding flags, constructor arguments, culture-specific information used to interpret arguments, activation attributes, and authorization to create the type.

public:
 virtual System::Runtime::Remoting::ObjectHandle ^ CreateInstance(System::String ^ assemblyName, System::String ^ typeName, bool ignoreCase, System::Reflection::BindingFlags bindingAttr, System::Reflection::Binder ^ binder, cli::array <System::Object ^> ^ args, System::Globalization::CultureInfo ^ culture, cli::array <System::Object ^> ^ activationAttributes, System::Security::Policy::Evidence ^ securityAttributes);
public:
 System::Runtime::Remoting::ObjectHandle ^ CreateInstance(System::String ^ assemblyName, System::String ^ typeName, bool ignoreCase, System::Reflection::BindingFlags bindingAttr, System::Reflection::Binder ^ binder, cli::array <System::Object ^> ^ args, System::Globalization::CultureInfo ^ culture, cli::array <System::Object ^> ^ activationAttributes, System::Security::Policy::Evidence ^ securityAttributes);
public System.Runtime.Remoting.ObjectHandle CreateInstance (string assemblyName, string typeName, bool ignoreCase, System.Reflection.BindingFlags bindingAttr, System.Reflection.Binder binder, object[] args, System.Globalization.CultureInfo culture, object[] activationAttributes, System.Security.Policy.Evidence securityAttributes);
[System.Obsolete("Methods which use evidence to sandbox are obsolete and will be removed in a future release of the .NET Framework. Please use an overload of CreateInstance which does not take an Evidence parameter. See http://go.microsoft.com/fwlink/?LinkID=155570 for more information.")]
public System.Runtime.Remoting.ObjectHandle CreateInstance (string assemblyName, string typeName, bool ignoreCase, System.Reflection.BindingFlags bindingAttr, System.Reflection.Binder binder, object[] args, System.Globalization.CultureInfo culture, object[] activationAttributes, System.Security.Policy.Evidence securityAttributes);
[System.Obsolete("Use an overload that does not take an Evidence parameter")]
public System.Runtime.Remoting.ObjectHandle CreateInstance (string assemblyName, string typeName, bool ignoreCase, System.Reflection.BindingFlags bindingAttr, System.Reflection.Binder binder, object[] args, System.Globalization.CultureInfo culture, object[] activationAttributes, System.Security.Policy.Evidence securityAttributes);
abstract member CreateInstance : string * string * bool * System.Reflection.BindingFlags * System.Reflection.Binder * obj[] * System.Globalization.CultureInfo * obj[] * System.Security.Policy.Evidence -> System.Runtime.Remoting.ObjectHandle
override this.CreateInstance : string * string * bool * System.Reflection.BindingFlags * System.Reflection.Binder * obj[] * System.Globalization.CultureInfo * obj[] * System.Security.Policy.Evidence -> System.Runtime.Remoting.ObjectHandle
[<System.Obsolete("Methods which use evidence to sandbox are obsolete and will be removed in a future release of the .NET Framework. Please use an overload of CreateInstance which does not take an Evidence parameter. See http://go.microsoft.com/fwlink/?LinkID=155570 for more information.")>]
abstract member CreateInstance : string * string * bool * System.Reflection.BindingFlags * System.Reflection.Binder * obj[] * System.Globalization.CultureInfo * obj[] * System.Security.Policy.Evidence -> System.Runtime.Remoting.ObjectHandle
override this.CreateInstance : string * string * bool * System.Reflection.BindingFlags * System.Reflection.Binder * obj[] * System.Globalization.CultureInfo * obj[] * System.Security.Policy.Evidence -> System.Runtime.Remoting.ObjectHandle
[<System.Obsolete("Use an overload that does not take an Evidence parameter")>]
member this.CreateInstance : string * string * bool * System.Reflection.BindingFlags * System.Reflection.Binder * obj[] * System.Globalization.CultureInfo * obj[] * System.Security.Policy.Evidence -> System.Runtime.Remoting.ObjectHandle
[<System.Obsolete("Use an overload that does not take an Evidence parameter")>]
abstract member CreateInstance : string * string * bool * System.Reflection.BindingFlags * System.Reflection.Binder * obj[] * System.Globalization.CultureInfo * obj[] * System.Security.Policy.Evidence -> System.Runtime.Remoting.ObjectHandle
override this.CreateInstance : string * string * bool * System.Reflection.BindingFlags * System.Reflection.Binder * obj[] * System.Globalization.CultureInfo * obj[] * System.Security.Policy.Evidence -> System.Runtime.Remoting.ObjectHandle
Public Function CreateInstance (assemblyName As String, typeName As String, ignoreCase As Boolean, bindingAttr As BindingFlags, binder As Binder, args As Object(), culture As CultureInfo, activationAttributes As Object(), securityAttributes As Evidence) As ObjectHandle

Parameters

assemblyName
String

The display name of the assembly. See FullName.

typeName
String

The fully qualified name of the requested type, including the namespace but not the assembly, as returned by the FullName property.

ignoreCase
Boolean

A Boolean value specifying whether to perform a case-sensitive search or not.

bindingAttr
BindingFlags

A combination of zero or more bit flags that affect the search for the typeName constructor. If bindingAttr is zero, a case-sensitive search for public constructors is conducted.

binder
Binder

An object that enables the binding, coercion of argument types, invocation of members, and retrieval of MemberInfo objects using reflection. If binder is null, the default binder is used.

args
Object[]

The arguments to pass to the constructor. This array of arguments must match in number, order, and type the parameters of the constructor to invoke. If the parameterless constructor is preferred, args must be an empty array or null.

culture
CultureInfo

Culture-specific information that governs the coercion of args to the formal types declared for the typeName constructor. If culture is null, the CultureInfo for the current thread is used.

activationAttributes
Object[]

An array of one or more attributes that can participate in activation. Typically, an array that contains a single UrlAttribute object that specifies the URL that is required to activate a remote object.

This parameter is related to client-activated objects.Client activation is a legacy technology that is retained for backward compatibility but is not recommended for new development. Distributed applications should instead use Windows Communication Foundation.

securityAttributes
Evidence

Information used to authorize creation of typeName.

Returns

ObjectHandle

An object that is a wrapper for the new instance specified by typeName. The return value needs to be unwrapped to access the real object.

Implements

Attributes

Exceptions

The operation is attempted on an unloaded application domain.

assemblyName or typeName is null.

assemblyName is not a valid assembly.

-or-

Version 2.0 or later of the common language runtime is currently loaded and assemblyName was compiled with a later version.

An assembly or module was loaded twice with two different evidences.

assemblyName was not found.

The caller does not have permission to call this constructor.

No matching constructor was found.

The caller cannot provide activation attributes for an object that does not inherit from MarshalByRefObject.

-or-

securityAttributes is not null. When legacy CAS policy is not enabled, securityAttributes should be null

typename was not found in assemblyName.

This instance is null.

Remarks

See AssemblyName for the format of assemblyName.

An attempt to call CreateInstance on a target application domain that is not the current application domain will result in a successful load of the assembly in the target application domain. Since an Assembly is not MarshalByRefObject, when this method attempts to return the Assembly for the loaded assembly to the current application domain, the common language runtime will try to load the assembly into the current application domain and the load might fail. The assembly that is loaded into the current application domain might be different from the assembly that was loaded first if the path settings for the two application domains are different.

See also

Applies to