Csharp/C Sharp by API/System.Security.Permissions/PrincipalPolicy

PrincipalPolicy.Union

 
using System;
using System.Security.Permissions;
class MainClass
{
    public static void MyMethod() 
    { 
        PrincipalPermission perm1 = new PrincipalPermission(null, @"MACHINE\Managers");
        PrincipalPermission perm2 = new PrincipalPermission(null, @"MACHINE\Developers");
        // Make the demand.
        perm1.Union(perm2).Demand();
    }
}