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AppDomain.SetDynamicBase Method

Establishes the specified directory path as the location where dynamically generated files are stored and accessed.

[Visual Basic]
Public Sub SetDynamicBase( _
   ByVal path As String _
)
[C#]
public void SetDynamicBase(
 string path
);
[C++]
public: void SetDynamicBase(
 String* path
);
[JScript]
public function SetDynamicBase(
   path : String
);

Parameters

path
The fully-qualified path to where dynamic assemblies are stored.

Exceptions

Exception Type Condition
AppDomainUnloadedException Operations are attempted on an unloaded application domain.
SecurityException The caller does not have the correct permissions. See the requirements section.

Remarks

This method sets the DynamicBase property of the internal AppDomainSetup associated with this instance.

Example

[Visual Basic] 
Imports System
Imports System.Reflection
Imports System.Reflection.Emit



Class ADDynamicBase
   
   ' SetDynamicBase.exe
   Overloads Shared Sub Main(args() As String)
      ' Create a new AppDomain.
      Dim setup As New AppDomainSetup()
      ' Need to set the application name before setting the dynamic base.
      setup.ApplicationName = "MyApplication"
      Dim domain As AppDomain = AppDomain.CreateDomain("MyDomain", Nothing, setup)
      
      ' Tell the domain to search for assemblies in DynamicAssemblyDir.
      domain.SetDynamicBase("C:\DynamicAssemblyDir")
      
      ' Note that the actual dynamic directory has the form
      ' <DynamicBase>\<number>\<ApplicationName>, rather than
      ' simply <DynamicBase>.
      Dim dynamicDir As [String] = domain.DynamicDirectory
      ' The AssemblyBuilder won't create this directory automatically.
      If Not System.IO.Directory.Exists(dynamicDir) Then
         System.IO.Directory.CreateDirectory(dynamicDir)
      End If
      
      ' Define the dynamic assembly.
      Dim asmName As New AssemblyName()
      asmName.Name = "DynamicHelloWorld"
      Dim asm As AssemblyBuilder = AppDomain.CurrentDomain.DefineDynamicAssembly(asmName, AssemblyBuilderAccess.Save, dynamicDir)
      
      ' Define a dynamic module in the assembly.
      Dim [mod] As ModuleBuilder
      [mod] = asm.DefineDynamicModule("DynamicHelloWorld", "DynamicHelloWorld.dll")
      
      ' Define the "HelloWorld" type in the module.
      Dim typ As TypeBuilder = [mod].DefineType("HelloWorld", TypeAttributes.Public)
      
      ' Define the "SayHello" method.
      Dim meth As MethodBuilder = typ.DefineMethod("SayHello", MethodAttributes.Public, Nothing, Nothing)
      Dim il As ILGenerator = meth.GetILGenerator()
      il.EmitWriteLine("Hello World!")
      il.Emit(OpCodes.Ret)
      
      ' Complete the HelloWorld type.
      typ.CreateType()
      
      ' Save the assembly to the dynamic assembly directory.
      asm.Save("DynamicHelloWorld.dll")
      
      ' Launch MyExecutable.exe, which will load DynamicHelloWorld.dll.
      domain.ExecuteAssembly("MyExecutable.exe")
   End Sub 'Main
End Class 'ADDynamicBase

[C#] 
using System;
using System.Reflection;
using System.Reflection.Emit;

namespace AppDomainSnippets
{
    class ADDynamicBase
    {
        // SetDynamicBase.exe
        static void Main(string[] args)
        {
            // Create a new AppDomain.
            AppDomainSetup setup = new AppDomainSetup();
            // Need to set the application name before setting the dynamic base.
            setup.ApplicationName = "MyApplication";
            AppDomain domain = AppDomain.CreateDomain("MyDomain", null, setup);

            // Tell the domain to search for assemblies in DynamicAssemblyDir.
            domain.SetDynamicBase("C:\\DynamicAssemblyDir");
            
            // Note that the actual dynamic directory has the form
            // <DynamicBase>\<number>\<ApplicationName>, rather than
            // simply <DynamicBase>.
            String dynamicDir = domain.DynamicDirectory;
            // The AssemblyBuilder won't create this directory automatically.
            if(!System.IO.Directory.Exists(dynamicDir))
            {
                System.IO.Directory.CreateDirectory(dynamicDir);
            }

            // Define the dynamic assembly.
            AssemblyName asmName = new AssemblyName();
            asmName.Name = "DynamicHelloWorld";
            AssemblyBuilder asm = AppDomain.CurrentDomain.DefineDynamicAssembly
                (asmName, AssemblyBuilderAccess.Save, dynamicDir);

            // Define a dynamic module in the assembly.
            ModuleBuilder mod;
            mod = asm.DefineDynamicModule
                ("DynamicHelloWorld", "DynamicHelloWorld.dll");

            // Define the "HelloWorld" type in the module.
            TypeBuilder typ = mod.DefineType
                ("HelloWorld", TypeAttributes.Public);

            // Define the "SayHello" method.
            MethodBuilder meth = typ.DefineMethod
                ("SayHello", MethodAttributes.Public, null, null);
            ILGenerator il = meth.GetILGenerator();
            il.EmitWriteLine("Hello World!");
            il.Emit(OpCodes.Ret);

            // Complete the HelloWorld type.
            typ.CreateType();
            
            // Save the assembly to the dynamic assembly directory.
            asm.Save("DynamicHelloWorld.dll");

            // Launch MyExecutable.exe, which will load DynamicHelloWorld.dll.
            domain.ExecuteAssembly("MyExecutable.exe");
        }
    }
}

[C++] 
#using <mscorlib.dll>

using namespace System;
using namespace System::Reflection;
using namespace System::Reflection::Emit;

// SetDynamicBase.exe
int main() {
    String* args[] = Environment::GetCommandLineArgs();
    // Create a new AppDomain.
    AppDomainSetup* setup = new AppDomainSetup();
    // Need to set the application name before setting the dynamic base.
    setup->ApplicationName = S"MyApplication";
    AppDomain*  domain = AppDomain::CreateDomain(S"MyDomain", 0, setup);

    // Tell the domain to search for assemblies in DynamicAssemblyDir.
    domain->SetDynamicBase(S"C:\\DynamicAssemblyDir");

    // Note that the actual dynamic directory has the form
    // <DynamicBase>\<number>\<ApplicationName>, rather than
    // simply <DynamicBase>.
    String*  dynamicDir = domain->DynamicDirectory;
    // The AssemblyBuilder won't create this directory automatically.
    if (!System::IO::Directory::Exists(dynamicDir)) {
        System::IO::Directory::CreateDirectory(dynamicDir);
    }

    // Define the dynamic assembly.
    AssemblyName* asmName = new AssemblyName();
    asmName->Name = S"DynamicHelloWorld";
    AssemblyBuilder*  asmb = AppDomain::CurrentDomain->DefineDynamicAssembly
        (asmName, AssemblyBuilderAccess::Save, dynamicDir);

    // Define a dynamic module in the assembly.
    ModuleBuilder* mod;
    mod = asmb->DefineDynamicModule
        (S"DynamicHelloWorld", S"DynamicHelloWorld.dll");

    // Define the S"HelloWorld" type in the module.
    TypeBuilder*  typ = mod->DefineType
        (S"HelloWorld", TypeAttributes::Public);

    // Define the S"SayHello" method.
    MethodBuilder*  meth = typ->DefineMethod
        (S"SayHello", MethodAttributes::Public, 0, 0);
    ILGenerator*  il = meth->GetILGenerator();
    il->EmitWriteLine(S"Hello World!");
    il->Emit(OpCodes::Ret);

    // Complete the HelloWorld type.
    typ->CreateType();

    // Save the assembly to the dynamic assembly directory.
    asmb->Save(S"DynamicHelloWorld.dll");

    // Launch MyExecutable.exe, which will load DynamicHelloWorld.dll.
    domain->ExecuteAssembly(S"MyExecutable.exe");
}

[JScript] No example is available for JScript. To view a Visual Basic, C#, or C++ example, click the Language Filter button Language Filter in the upper-left corner of the page.

Requirements

Platforms: Windows 98, Windows NT 4.0, Windows Millennium Edition, Windows 2000, Windows XP Home Edition, Windows XP Professional, Windows Server 2003 family

.NET Framework Security: 

See Also

AppDomain Class | AppDomain Members | System Namespace | DynamicBase

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