AppDomain.CreateInstance Method (String, String, Object)
Assembly: mscorlib (in mscorlib.dll)
public ObjectHandle CreateInstance ( string assemblyName, string typeName, Object activationAttributes )
public final ObjectHandle CreateInstance ( String assemblyName, String typeName, Object activationAttributes )
public final function CreateInstance ( assemblyName : String, typeName : String, activationAttributes : Object ) : ObjectHandle
The display name of the assembly. See Assembly.FullName.
The fully qualified name of the requested type, including the namespace but not the assembly, as returned by the Type.FullName property.
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. For a detailed description of client-activated objects, see Client Activation.
Return ValueAn object that is a wrapper for the new instance specified by typeName. The return value needs to be unwrapped to access the real object.
The operation is attempted on an unloaded application domain.
assemblyName or typeName is a null reference (Nothing in Visual Basic).
assemblyName is not a valid assembly.
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 a null reference (Nothing in Visual Basic).
This method calls the default 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.
- 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 98, Windows Server 2000 SP4, Windows Millennium Edition, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter EditionThe Microsoft .NET Framework 3.0 is supported on Windows Vista, Microsoft Windows XP SP2, and Windows Server 2003 SP1.