AssemblyBuilder.DefineDynamicModule Method (String, String) (System.Reflection.Emit)

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.NET Framework Class Library

AssemblyBuilder.DefineDynamicModule Method (String, String)

Defines a persistable dynamic module with the given name that will be saved to the specified file. No symbol information is emitted.

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

Syntax

Visual Basic

Public Function DefineDynamicModule ( _
	name As String, _
	fileName As String _
) As ModuleBuilder

public ModuleBuilder DefineDynamicModule(
	string name,
	string fileName
)

Visual C++

public:
ModuleBuilder^ DefineDynamicModule(
	String^ name, 
	String^ fileName
)

member DefineDynamicModule : 
        name:string * 
        fileName:string -> ModuleBuilder

Parameters

name: Type: System.String
The name of the dynamic module. Must be less than 260 characters in length.

fileName: Type: System.String
The name of the file to which the dynamic module should be saved.

Return Value

Type: System.Reflection.Emit.ModuleBuilder
A ModuleBuilder object representing the defined dynamic module.

Exceptions

Exception	Condition
ArgumentNullException	name or fileName is null.
ArgumentException	The length of name or fileName is zero. -or- The length of name is greater than or equal to 260. -or- fileName contains a path specification (a directory component, for example). -or- There is a conflict with the name of another file that belongs to this assembly.
InvalidOperationException	This assembly has been previously saved.
NotSupportedException	This assembly was called on a dynamic assembly with Run attribute.
SecurityException	The caller does not have the required permission.
ExecutionEngineException	The assembly for default symbol writer cannot be loaded. -or- The type that implements the default symbol writer interface cannot be found.

Remarks

To define a persistable dynamic module, this assembly needs to be created with the Save or the RunAndSave attribute.

If you want the module to contain the assembly manifest, name should be the same as the name of the assembly (that is, the AssemblyName.Name property of the AssemblyName used to create the dynamic assembly) and fileName should be the same as the filename you specify when you save the assembly.

In an assembly with only one module, that module should contain the assembly manifest.

Note
To suppress optimizations when debugging dynamic modules, apply the DebuggableAttribute attribute to the dynamic assembly before calling DefineDynamicModule. Create an instance of DebuggableAttribute with the DisableOptimizations flag and apply it using the SetCustomAttribute method. The attribute must be applied to the dynamic assembly. It has no effect if applied to the module.

Note
Starting with the .NET Framework version 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 version 3.5 or later.

Examples

[Visual Basic, C#]

The code example below demonstrates how to create a persistent dynamic module using DefineDynamicModule.

Visual Basic


      Dim myAppDomain As AppDomain = Thread.GetDomain()
      Dim myAsmName As New AssemblyName()
      myAsmName.Name = "MyAssembly"
      Dim myAsmBuilder As AssemblyBuilder = myAppDomain.DefineDynamicAssembly(myAsmName, _
							AssemblyBuilderAccess.Run)
      ' Create a dynamic module that can be saved as the specified DLL name.
      Dim myModuleBuilder As ModuleBuilder = myAsmBuilder.DefineDynamicModule("MyModule3", _
									"MyModule3.dll")


	   AppDomain myAppDomain = Thread.GetDomain(); 
	   AssemblyName myAsmName = new AssemblyName();
	   myAsmName.Name = "MyAssembly";
	   AssemblyBuilder myAsmBuilder = myAppDomain.DefineDynamicAssembly(
							myAsmName,
							AssemblyBuilderAccess.Run);
	   // Create a dynamic module that can be saved as the specified DLL name.
	   ModuleBuilder myModuleBuilder = myAsmBuilder.DefineDynamicModule("MyModule3",
									    "MyModule3.dll");

Visual C++


AppDomain^ myAppDomain = Thread::GetDomain();
AssemblyName^ myAsmName = gcnew AssemblyName;
myAsmName->Name = "MyAssembly";
AssemblyBuilder^ myAsmBuilder = myAppDomain->DefineDynamicAssembly(
   myAsmName, AssemblyBuilderAccess::Run );

// Create a dynamic module that can be saved as the specified DLL name.
ModuleBuilder^ myModuleBuilder = myAsmBuilder->DefineDynamicModule(
   "MyModule3", "MyModule3.dll" );

Version Information

.NET Framework

Supported in: 4, 3.5, 3.0, 2.0, 1.1, 1.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

.NET Framework Security

ReflectionPermission
when invoked late-bound through mechanisms such as Type.InvokeMember. Associated enumeration: ReflectionPermissionFlag.MemberAccess.
FileIOPermission
Write=true or Append=true is needed to save the module

Platforms

Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows XP SP2 x64 Edition, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

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

Reference

AssemblyBuilder Class

DefineDynamicModule Overload

System.Reflection.Emit Namespace