AppDomain.CreateInstance Method (String, String, 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 ObjectHandle CreateInstance( string assemblyName, string typeName, Object activationAttributes )
- 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.
Return ValueType: System.Runtime.Remoting.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_AppDomain.CreateInstance(String, String, Object)
The operation is attempted on an unloaded application domain.
assemblyName or typeName is null.
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 null.
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.
for the ability to access the location of the assembly. Associated enumeration: FileIOPermissionAccess.PathDiscovery
for the ability to read the file containing the assembly manifest. Associated enumeration: FileIOPermissionAccess.Read
for the ability to access the location of the assembly if the assembly is not local.
for the ability to call unmanaged code when creating an instance of a delegate. Associated enumeration: SecurityPermissionFlag.UnmanagedCode
for the ability to invoke operations on all type members. Associated enumeration: ReflectionPermissionFlag.MemberAccess
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.