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AddInToken.Activate<T> Method (AddInProcess, AddInSecurityLevel)

Activates an add-in in an external process, in a new application domain, and with a specified trust level.

Namespace:  System.AddIn.Hosting
Assembly:  System.AddIn (in System.AddIn.dll)

[PermissionSetAttribute(SecurityAction.Demand, Name = "FullTrust")]
public T Activate<T>(
	AddInProcess process,
	AddInSecurityLevel level

Type Parameters


The interface or abstract base type that represents the host view of the add-in.


Type: System.AddIn.Hosting.AddInProcess
The external process in which to activate the add-in.
Type: System.AddIn.Hosting.AddInSecurityLevel
One of the enumeration values that specifies the trust level.

Return Value

Type: T
The host view of the add-in.

This method sets the base directory for the application domain to be the location of the add-in assembly. It also looks for the configuration file [addinassemblyname].dll.config and, if found, sets it to be the configuration file for the new application domain.

The following example creates a new process and activates an add-in in that process with a full trust security level.

// Create an external process.
AddInProcess pExternal = new AddInProcess();

// Activate an add-in in the external process
// with a full trust security level.
Calculator CalcAddIn4 =

// Show that the add-in is an an external process
// by verifying that it is not in the current (host's) process.
AddInController AddinCtl = AddInController.GetAddInController(CalcAddIn4);
Console.WriteLine("Add-in in host's process: {0}",

.NET Framework

Supported in: 4, 3.5

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

  • SecurityAction.Demand 

    full trust for the immediate caller. This member cannot be used by partially trusted code.

Windows 7, Windows Vista SP1 or later, Windows XP SP3, 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.