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ModuleBuilder Class

Defines and represents a module in a dynamic assembly.

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

'Declaration
<ComVisibleAttribute(True)> _
<ClassInterfaceAttribute(ClassInterfaceType.None)> _
<HostProtectionAttribute(SecurityAction.LinkDemand, MayLeakOnAbort := True)> _
Public Class ModuleBuilder _
	Inherits Module _
	Implements _ModuleBuilder
'Usage
Dim instance As ModuleBuilder

NoteNote:

The HostProtectionAttribute attribute applied to this type or member has the following Resources property value: MayLeakOnAbort. The HostProtectionAttribute does not affect desktop applications (which are typically started by double-clicking an icon, typing a command, or entering a URL in a browser). For more information, see the HostProtectionAttribute class or SQL Server Programming and Host Protection Attributes.

To get an instance of ModuleBuilder, use the AssemblyBuilder.DefineDynamicModule method.

The following code sample demonstrates the use of ModuleBuilder to create a dynamic module. Note that the ModuleBuilder is created by calling DefineDynamicModule in AssemblyBuilder, rather than through a constructor.

Imports System
Imports System.Reflection
Imports System.Reflection.Emit
Imports System.Security.Permissions

Public Class CodeGenerator
   Private myAssemblyBuilder As AssemblyBuilder

   Public Sub New()
      ' Get the current application domain for the current thread. 
      Dim myCurrentDomain As AppDomain = AppDomain.CurrentDomain
      Dim myAssemblyName As New AssemblyName()
      myAssemblyName.Name = "TempAssembly" 

      ' Define a dynamic assembly in the current application domain.
      myAssemblyBuilder = _
               myCurrentDomain.DefineDynamicAssembly(myAssemblyName, AssemblyBuilderAccess.Run)

      ' Define a dynamic module in this assembly. 
      Dim myModuleBuilder As ModuleBuilder = myAssemblyBuilder.DefineDynamicModule("TempModule")

      ' Define a runtime class with specified name and attributes. 
      Dim myTypeBuilder As TypeBuilder = _
               myModuleBuilder.DefineType("TempClass", TypeAttributes.Public)

      ' Add 'Greeting' field to the class, with the specified attribute and type. 
      Dim greetingField As FieldBuilder = _
               myTypeBuilder.DefineField("Greeting", GetType(String), FieldAttributes.Public)
      Dim myMethodArgs As Type() = {GetType(String)}

      ' Add 'MyMethod' method to the class, with the specified attribute and signature. 
      Dim myMethod As MethodBuilder = _
               myTypeBuilder.DefineMethod("MyMethod", MethodAttributes.Public, _
               CallingConventions.Standard, Nothing, myMethodArgs)

      Dim methodIL As ILGenerator = myMethod.GetILGenerator()
      methodIL.EmitWriteLine("In the method...")
      methodIL.Emit(OpCodes.Ldarg_0)
      methodIL.Emit(OpCodes.Ldarg_1)
      methodIL.Emit(OpCodes.Stfld, greetingField)
      methodIL.Emit(OpCodes.Ret)
      myTypeBuilder.CreateType()
   End Sub 'New 

   Public ReadOnly Property MyAssembly() As AssemblyBuilder
      Get 
         Return Me.myAssemblyBuilder
      End Get 
   End Property 
End Class 'CodeGenerator

Public Class TestClass
   <PermissionSetAttribute(SecurityAction.Demand, Name:="FullTrust")> _
   Public Shared Sub Main()
      Dim myCodeGenerator As New CodeGenerator()
      ' Get the assembly builder for 'myCodeGenerator' object. 
      Dim myAssemblyBuilder As AssemblyBuilder = myCodeGenerator.MyAssembly
      ' Get the module builder for the above assembly builder object . 
      Dim myModuleBuilder As ModuleBuilder = myAssemblyBuilder.GetDynamicModule("TempModule")
      Console.WriteLine("The fully qualified name and path to this " + _
                        "module is :" + myModuleBuilder.FullyQualifiedName)
      Dim myType As Type = myModuleBuilder.GetType("TempClass")
      Dim myMethodInfo As MethodInfo = myType.GetMethod("MyMethod")
      ' Get the token used to identify the method within this module. 
      Dim myMethodToken As MethodToken = myModuleBuilder.GetMethodToken(myMethodInfo)
      Console.WriteLine("Token used to identify the method of 'myType'" + _
                        " within the module is {0:x}", myMethodToken.Token)
      Dim args As Object() = {"Hello."}
      Dim myObject As Object = Activator.CreateInstance(myType, Nothing, Nothing)
      myMethodInfo.Invoke(myObject, args)
   End Sub 'Main
End Class 'TestClass

System.Object
  System.Reflection.Module
    System.Reflection.Emit.ModuleBuilder

Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.

Windows 7, Windows Vista, Windows XP SP2, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP Starter Edition, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003, Windows Server 2000 SP4, Windows Millennium Edition, Windows 98

The .NET Framework and .NET Compact Framework do not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

.NET Framework

Supported in: 3.5, 3.0, 2.0, 1.1, 1.0
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