This documentation is archived and is not being maintained.

AppDomain::Id Property

Gets an integer that uniquely identifies the application domain within the process.

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

property int Id {
	int get ();

Property Value

Type: System::Int32
An integer that identifies the application domain.

The following code example creates a second application domain and displays information about the default domain and the new domain.

using namespace System;
using namespace System::Reflection;

// This method has the same signature as the CrossAppDomainDelegate,
// so that it can be executed easily in the new application domain.
static void ShowDomainInfo()
    AppDomain^ ad = AppDomain::CurrentDomain;
    Console::WriteLine( L"FriendlyName: {0}", ad->FriendlyName );
    Console::WriteLine( L"Id: {0}", ad->Id );
    Console::WriteLine( L"IsDefaultAppDomain: {0}", ad->IsDefaultAppDomain() );

// The following attribute indicates to the loader that assemblies
// in the global assembly cache should be shared across multiple 
// application domains.
int main()
    // Show information for the default application domain.

    // Create a new application domain and display its information.
    AppDomain^ newDomain = AppDomain::CreateDomain( L"MyMultiDomain" );
    newDomain->DoCallBack( gcnew CrossAppDomainDelegate( ShowDomainInfo ) );

    return 0;

.NET Framework

Supported in: 4, 3.5, 3.0, 2.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

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.