Activator.CreateInstanceFrom Method (AppDomain, String, String)
Creates an instance of the type whose name is specified in the specified remote domain, using the named assembly file and default constructor.
Assembly: mscorlib (in mscorlib.dll)
public static ObjectHandle CreateInstanceFrom( AppDomain domain, string assemblyFile, string typeName )
- Type: System.AppDomain
The remote domain where the type named typeName is created.
- Type: System.String
The name of a file that contains an assembly where the type named typeName is sought.
- Type: System.String
The name of the preferred type.
Return ValueType: System.Runtime.Remoting.ObjectHandle
A handle that must be unwrapped to access the newly created instance.
domain or typeName is null.
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 application domain that has restricted security permissions.
Use the ObjectHandle.Unwrap method to unwrap the return value.
for the ability to call unmanaged code when creating an instance of a delegate. Associated enumeration: SecurityPermissionFlag.UnmanagedCode
requires full trust for the immediate caller. This member cannot be used by partially trusted or transparent code.
Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)
The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.