RegistrationServices.RegisterAssembly Method (Assembly, AssemblyRegistrationFlags)


Registers the classes in a managed assembly to enable creation from COM.

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

public virtual bool RegisterAssembly(
	Assembly assembly,
	AssemblyRegistrationFlags flags


Type: System.Reflection.Assembly

The assembly to be registered.

Type: System.Runtime.InteropServices.AssemblyRegistrationFlags

An AssemblyRegistrationFlags value indicating any special settings used when registering assembly.

Return Value

Type: System.Boolean

true if assembly contains types that were successfully registered; otherwise false if the assembly contains no eligible types.

Exception Condition

assembly is null.


The full name of assembly is null.


A method marked with ComRegisterFunctionAttribute is not static.


There is more than one method marked with ComRegisterFunctionAttribute at a given level of the hierarchy.


The signature of the method marked with ComRegisterFunctionAttribute is not valid.


A user-defined custom registration function (marked with the ComRegisterFunctionAttribute attribute) throws an exception.

RegisterAssembly adds the appropriate registry entries for the types in the specified assembly. This method also calls any registration functions found in the assembly.

Use Assembly.Load to get an assembly.


requires full trust for the immediate caller. This member cannot be used by partially trusted or transparent code.

.NET Framework
Available since 1.1
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