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Thread.CurrentPrincipal Property


Gets or sets the thread's current principal (for role-based security).

 static property System::Security::Principal::IPrincipal ^ CurrentPrincipal { System::Security::Principal::IPrincipal ^ get(); void set(System::Security::Principal::IPrincipal ^ value); };
public static System.Security.Principal.IPrincipal? CurrentPrincipal { get; set; }
public static System.Security.Principal.IPrincipal CurrentPrincipal { get; set; }
static member CurrentPrincipal : System.Security.Principal.IPrincipal with get, set
Public Shared Property CurrentPrincipal As IPrincipal

Property Value

An IPrincipal value representing the security context.


The caller does not have the permission required to set the principal.


The following code example shows how to set and retrieve the principal of a thread.

using namespace System;
using namespace System::Security;
using namespace System::Security::Permissions;
using namespace System::Security::Principal;
using namespace System::Threading;

int main()
   array<String^>^rolesArray = {"managers","executives"};
      // Set the principal to a new generic principal.
      Thread::CurrentPrincipal = gcnew GenericPrincipal( gcnew GenericIdentity( "Bob","Passport" ),rolesArray );
   catch ( SecurityException^ secureException ) 
      Console::WriteLine( "{0}: Permission to set Principal "
      "is denied.", secureException->GetType()->Name );

   IPrincipal^ threadPrincipal = Thread::CurrentPrincipal;
   Console::WriteLine( "Name: {0}\nIsAuthenticated: {1}"
   "\nAuthenticationType: {2}", threadPrincipal->Identity->Name, threadPrincipal->Identity->IsAuthenticated.ToString(), threadPrincipal->Identity->AuthenticationType );
using System;
using System.Security;
using System.Security.Permissions;
using System.Security.Principal;
using System.Threading;

class Principal
    static void Main()
        string[] rolesArray = {"managers", "executives"};
            // Set the principal to a new generic principal.
            Thread.CurrentPrincipal = 
                new GenericPrincipal(new GenericIdentity(
                "Bob", "Passport"), rolesArray);
        catch(SecurityException secureException)
            Console.WriteLine("{0}: Permission to set Principal " +
                "is denied.", secureException.GetType().Name);

        IPrincipal threadPrincipal = Thread.CurrentPrincipal;
        Console.WriteLine("Name: {0}\nIsAuthenticated: {1}" +
            "\nAuthenticationType: {2}", 
open System.Security
open System.Security.Principal
open System.Threading

let rolesArray = [| "managers"; "executives" |]

    // Set the principal to a new generic principal.
    Thread.CurrentPrincipal <- GenericPrincipal(GenericIdentity("Bob", "Passport"), rolesArray)
with :? SecurityException as secureException ->
    printfn $"{secureException.GetType().Name}: Permission to set Principal is denied."

let threadPrincipal = Thread.CurrentPrincipal

printfn $"Name: {threadPrincipal.Identity.Name}\nIsAuthenticated: {threadPrincipal.Identity.IsAuthenticated}\nAuthenticationType: {threadPrincipal.Identity.AuthenticationType}"
Option Explicit
Option Strict

Imports System.Security
Imports System.Security.Permissions
Imports System.Security.Principal
Imports System.Threading

Public Class Principal

    <MTAThread> _
    Shared Sub Main()
        Dim rolesArray As String() = {"managers", "executives"}
            ' Set the principal to a new generic principal.
            Thread.CurrentPrincipal = _
                New GenericPrincipal(New GenericIdentity( _
                "Bob", "Passport"), rolesArray)

        Catch secureException As SecurityException
            Console.WriteLine("{0}: Permission to set Principal " & _
                "is denied.", secureException.GetType().Name)
        End Try

        Dim threadPrincipal As IPrincipal = Thread.CurrentPrincipal
        Console.WriteLine( _
            "Name: {0}" & vbCrLf & "IsAuthenticated:" & _
            " {1}" & vbCrLf & "AuthenticationType: {2}", _
            threadPrincipal.Identity.Name, _
            threadPrincipal.Identity.IsAuthenticated, _
    End Sub
End Class

Applies to