Get current ActiveDirectory user groups

getUserGroups.cs

using System;
using System.Collections.Generic;
using System.DirectoryServices.AccountManagement;
using System.Linq;
using System.Security.Principal;

namespace console
{
    class MainClass
    {
        public static void Main (string[] args)
        {
            var groups = CurrentUserGroups();
            var groupsString = string.Join(", ", groups);

            Console.Write(groupsString + "\n");
        }

        private static IEnumerable<GroupPrincipal> CurrentUserGroups()
        {
            var result = new List<GroupPrincipal>();
            var groups = CurrentUser().GetAuthorizationGroups();
            result.AddRange(groups.OfType<GroupPrincipal>());

            return result;
        }

        private static UserPrincipal CurrentUser()
        {
            var context = new PrincipalContext(ContextType.Domain);
            var currentUserName = WindowsIdentity.GetCurrent().Name;
            var user = UserPrincipal.FindByIdentity(context, currentUserName);

            return user;
        }
    }
}