Export (0) Print
Expand All
This topic has not yet been rated - Rate this topic

AppDomain.SetThreadPrincipal Method

Sets the default principal object to be attached to threads if they attempt to bind to a principal while executing in this application domain.

Namespace:  System
Assembly:  mscorlib (in mscorlib.dll)
[SecurityPermissionAttribute(SecurityAction.Demand, Flags = SecurityPermissionFlag.ControlPrincipal)]
public void SetThreadPrincipal(
	IPrincipal principal
)

Parameters

principal
Type: System.Security.Principal.IPrincipal

The principal object to attach to threads.

Implements

_AppDomain.SetThreadPrincipal(IPrincipal)
ExceptionCondition
ArgumentNullException

principal is null.

PolicyException

The thread principal has already been set.

AppDomainUnloadedException

The operation is attempted on an unloaded application domain.

The following example shows the effect of using the SetThreadPrincipal method to change the principal that is available for attaching to threads that are executing in the application domain. It also shows the effect on threads of using the SetPrincipalPolicy method to change the principal policy of the application domain.

using System;
using System.Security.Principal;
using System.Threading;

class ADPrincipal
{
	static void Main(string[] args)
	{
		// Create a new thread with a generic principal.
		Thread t = new Thread(new ThreadStart(PrintPrincipalInformation));
		t.Start();
		t.Join();

		// Set the principal policy to WindowsPrincipal.
		AppDomain currentDomain = AppDomain.CurrentDomain;
		currentDomain.SetPrincipalPolicy(PrincipalPolicy.WindowsPrincipal);
			
		// The new thread will have a Windows principal representing the 
		// current user.
		t = new Thread(new ThreadStart(PrintPrincipalInformation));
		t.Start();
		t.Join();

		// Create a principal to use for new threads.
		IIdentity identity = new GenericIdentity("NewUser");
		IPrincipal principal = new GenericPrincipal(identity, null);
		currentDomain.SetThreadPrincipal(principal);
			
		// Create a new thread with the principal created above.
		t = new Thread(new ThreadStart(PrintPrincipalInformation));
		t.Start();
		t.Join();
		
		// Wait for user input before terminating.
		Console.ReadLine();
	}

	static void PrintPrincipalInformation()
	{
		IPrincipal curPrincipal = Thread.CurrentPrincipal;
		if(curPrincipal != null)
		{
			Console.WriteLine("Type: " + curPrincipal.GetType().Name);
			Console.WriteLine("Name: " + curPrincipal.Identity.Name);
			Console.WriteLine("Authenticated: " +
				curPrincipal.Identity.IsAuthenticated);
			Console.WriteLine();
		}
	}
}

.NET Framework

Supported in: 4.5.1, 4.5, 4, 3.5, 3.0, 2.0, 1.1, 1.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Windows Phone 8.1, Windows Phone 8, Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

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

Did you find this helpful?
(1500 characters remaining)
Thank you for your feedback
Show:
© 2014 Microsoft. All rights reserved.