DefineType Method (String, TypeAttributes)

ModuleBuilder::DefineType Method (String^, TypeAttributes)


Constructs a TypeBuilder given the type name and the type attributes.

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

TypeBuilder^ DefineType(
	String^ name,
	TypeAttributes attr


Type: System::String^

The full path of the type. name cannot contain embedded nulls.

Type: System.Reflection::TypeAttributes

The attributes of the defined type.

Return Value

Type: System.Reflection.Emit::TypeBuilder^

A TypeBuilder created with all of the requested attributes.

Exception Condition

A type with the given name exists in the parent assembly of this module.


Nested type attributes are set on a type that is not nested.


name is null.

Type names must be unique within an assembly. You cannot have two types with the same name in two different modules of an assembly.


Starting with the .NET Framework 2.0 Service Pack 1, this member no longer requires ReflectionPermission with the ReflectionPermissionFlag::ReflectionEmit flag. (See Security Issues in Reflection Emit.) To use this functionality, your application should target the .NET Framework 3.5 or later.

The following example creates a TypeBuilder in the current dynamic module using CreateType, builds and completes the type, and saves the assembly.

AssemblyName^ asmname = gcnew AssemblyName;
asmname->Name = "assemfilename.exe";
AssemblyBuilder^ asmbuild = System::Threading::Thread::GetDomain()->
   DefineDynamicAssembly( asmname, AssemblyBuilderAccess::RunAndSave );
ModuleBuilder^ modbuild = asmbuild->DefineDynamicModule( "modulename",
   "assemfilename.exe" );
TypeBuilder^ typebuild1 = modbuild->DefineType( "typename" );
asmbuild->Save( "assemfilename.exe" );

.NET Framework
Available since 1.1
Available since 2.0
Return to top
© 2015 Microsoft