AppDomain.CreateInstanceFrom Method (String, String, Boolean, BindingFlags, Binder, Object(), CultureInfo, Object())
Creates a new instance of the specified type defined in the specified assembly file.
Assembly: mscorlib (in mscorlib.dll)
'Declaration Public Function CreateInstanceFrom ( _ assemblyFile As String, _ typeName As String, _ ignoreCase As Boolean, _ bindingAttr As BindingFlags, _ binder As Binder, _ args As Object(), _ culture As CultureInfo, _ activationAttributes As Object() _ ) As ObjectHandle
- Type: System.String
The name, including the path, of a file that contains an assembly that defines the requested type. The assembly is loaded using the LoadFrom method.
- 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.
- Type: System.Boolean
A Boolean value specifying whether to perform a case-sensitive search or not.
- Type: System.Reflection.BindingFlags
A combination of zero or more bit flags that affect the search for the typeName constructor. If bindingAttr is zero, a case-sensitive search for public constructors is conducted.
- Type: System.Reflection.Binder
An object that enables the binding, coercion of argument types, invocation of members, and retrieval of MemberInfo objects through reflection. If binder is null, the default binder is used.
- Type: System.Object()
The arguments to pass to the constructor. This array of arguments must match in number, order, and type the parameters of the constructor to invoke. If the default constructor is preferred, args must be an empty array or null.
- Type: System.Globalization.CultureInfo
Culture-specific information that governs the coercion of args to the formal types declared for the typeName constructor. If culture is Nothing, the CultureInfo for the current thread is used.
- Type: System.Object()
An array of one or more attributes that can participate in activation. Typically, an array that contains a single UrlAttribute object that specifies the URL that is required to activate a remote object.
This parameter is related to client-activated objects. Client activation is a legacy technology that is retained for backward compatibility but is not recommended for new development. Distributed applications should instead use Windows Communication Foundation.
Return ValueType: System.Runtime.Remoting.ObjectHandle
An object that is a wrapper for the new instance, or Nothing if typeName is not found. The return value needs to be unwrapped to access the real object.
assemblyFile is Nothing.
typeName is Nothing.
The caller cannot provide activation attributes for an object that does not inherit from MarshalByRefObject.
The operation is attempted on an unloaded application domain.
assemblyFile was not found.
typeName was not found in assemblyFile.
No matching public constructor was found.
The caller does not have sufficient permission to call this constructor.
assemblyFile is not a valid assembly.
assemblyFile was compiled with a later version of the common language runtime than the version that is currently loaded.
An assembly or module was loaded twice with two different evidences.
This instance is Nothing.
For more information, see the Activator.CreateInstanceFrom method.
When the CreateInstanceFrom method is used to create an instance in a target application domain, other than the application domain from which the call is made, the assembly is loaded in the target application domain. However, if the instance is unwrapped in the calling application domain, using the unwrapped instance in certain ways can cause the assembly to be loaded into the calling application domain. For example, after the instance is unwrapped, its type information might be requested, in order to call its methods late-bound. When the assembly is loaded into the calling application domain, exceptions can occur.
If another version of the same assembly was previously loaded into the calling application domain, or if the load path of the calling application domain is different from that of the target application domain, exceptions such as MissingMethodException can occur.
If the calling application domain makes early-bound calls to the instance type, InvalidCastException can be thrown when an attempt is made to cast the instance.
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.