Activator.CreateInstanceFrom Method (AppDomain, String, String)
Assembly: mscorlib (in mscorlib.dll)
public static ObjectHandle CreateInstanceFrom ( AppDomain domain, string assemblyFile, string typeName )
public static ObjectHandle CreateInstanceFrom ( AppDomain domain, String assemblyFile, String typeName )
public static function CreateInstanceFrom ( domain : AppDomain, assemblyFile : String, typeName : String ) : ObjectHandle
The remote domain where the type named typeName is created.
The name of a file that contains an assembly where the type named typeName is sought.
The name of the preferred type.
Return ValueA handle that must be unwrapped to access the newly created instance.
domain or typeName is a null reference (Nothing in Visual Basic).
No matching public constructor was found.
typename was not found in assemblyFile.
assemblyFile was not found.
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.
The constructor, which was invoked through reflection, threw an exception.
The caller does have the required FileIOPermission.
assemblyFile is not a valid assembly.
The common language runtime (CLR) version 2.0 or later is currently loaded, and assemblyName was compiled for a version of the CLR that is later than the currently loaded version. Note that the .NET Framework versions 2.0, 3.0, and 3.5 all use CLR version 2.0.
Use CreateInstanceFrom when a host needs to execute code in an AppDomain with restricted security permissions.
Use the ObjectHandle.Unwrap method to unwrap the return value.
This method uses SecurityAction.LinkDemand to require the immediate caller to have full trust. For important limitations on using the LinkDemand member, see [<topic://cpcondemandvslinkdemand>].
- LinkDemand for full trust for the immediate caller. This member cannot be used by partially trusted code.
- SecurityPermission for the ability to call unmanaged code when creating an instance of a delegate. Associated enumeration: SecurityPermissionFlag.UnmanagedCode
- FileIOPermission for the ability to search directory paths and read their contents. Associated enumerations: FileIOPermissionAccess.PathDiscovery and FileIOPermissionAccess.Read
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.