AppDomain::CreateInstance Method (String, String, array<Object>)
Creates a new instance of the specified type defined in the specified assembly. A parameter specifies an array of activation attributes.
Assembly: mscorlib (in mscorlib.dll)
public: virtual ObjectHandle^ CreateInstance( String^ assemblyName, String^ typeName, array<Object^>^ activationAttributes ) sealed
Parameters
- assemblyName
- Type: System::String
The display name of the assembly. See Assembly::FullName.
- typeName
- Type: System::String
The fully qualified name of the requested type, including the namespace but not the assembly, as returned by the Type::FullName property.
- activationAttributes
- Type: array<System::Object>
An array of one or more attributes that can participate in activation. Typically, an array that contains a single UrlAttribute object. The UrlAttribute specifies the URL that is required to activate a remote object.
Return Value
Type: System.Runtime.Remoting::ObjectHandleAn 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
_AppDomain::CreateInstance(String, String, array<Object>)| Exception | Condition |
|---|---|
| AppDomainUnloadedException | The operation is attempted on an unloaded application domain. |
| ArgumentNullException | assemblyName or typeName is nullptr. |
| BadImageFormatException | 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. |
| FileLoadException | An assembly or module was loaded twice with two different evidences. |
| FileNotFoundException | assemblyName was not found. |
| MethodAccessException | The caller does not have permission to call this constructor. |
| MissingMethodException | No matching public constructor was found. |
| NotSupportedException | The caller cannot provide activation attributes for an object that does not inherit from MarshalByRefObject. |
| TypeLoadException | typename was not found in assemblyName. |
| NullReferenceException | This instance is nullptr. |
This method calls the default constructor for typeName.
See AssemblyName for the format of assemblyName.
The activationAttributes parameter is related to client-activated objects; see Client Activation.
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.
- FileIOPermissionAccess
for the ability to access the location of the assembly. Associated enumeration: FileIOPermissionAccess::PathDiscovery
- FileIOPermissionAccess
for the ability to read the file containing the assembly manifest. Associated enumeration: FileIOPermissionAccess::Read
- WebPermission
for the ability to access the location of the assembly if the assembly is not local.
- SecurityPermission
for the ability to call unmanaged code when creating an instance of a delegate. Associated enumeration: SecurityPermissionFlag::UnmanagedCode
- ReflectionPermission
for the ability to invoke operations on all type members. 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.