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AppDomain.CreateComInstanceFrom Method (String, String)

Creates a new instance of a specified COM type. Parameters specify the name of a file that contains an assembly containing the type and the name of the type.

Namespace:  System
Assembly:  mscorlib (in mscorlib.dll)

member CreateComInstanceFrom : 
        assemblyName:string * 
        typeName:string -> ObjectHandle

Parameters

assemblyName
Type: System.String

The name of a file containing an assembly that defines the requested type.

typeName
Type: System.String

The name of the requested type.

Return Value

Type: 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.

ExceptionCondition
ArgumentNullException

assemblyName or typeName is a null reference (Nothing in Visual Basic).

TypeLoadException

The type cannot be loaded.

AppDomainUnloadedException

The operation is attempted on an unloaded application domain.

MissingMethodException

No public parameterless constructor was found.

FileNotFoundException

assemblyName is not found.

MemberAccessException

typeName is an abstract class.

-or-

This member was invoked with a late-binding mechanism.

NotSupportedException

The caller cannot provide activation attributes for an object that does not inherit from MarshalByRefObject.

ArgumentException

assemblyName is an empty string ("").

BadImageFormatException

assemblyName is not a valid assembly.

FileLoadException

An assembly or module was loaded twice with two different evidences.

NullReferenceException

The COM object that is being referred to is a null reference (Nothing in Visual Basic).

Use this method to create objects remotely without having to load the type locally.

The return value must to be unwrapped to access the real object.

A System.Runtime.InteropServices.ComVisibleAttribute attribute with a value of true must be applied either explicitly or by default to the COM type for this method to create an instance of that type; otherwise, TypeLoadException is thrown.

The following sample demonstrates

No code example is currently available or this language may not be supported.

.NET Framework

Supported in: 4.6, 4.5, 4, 3.5, 3.0, 2.0, 1.1

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

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