ambiguous: Microsoft.SharePoint.Client.UserProfiles / Microsoft.Office.Server.UserProfiles

I have a web part I am trying to build and I need the UserProfilePropertiesForUser value for EmployeeNumber which is a custom field. To get this i am using   SPContext.Current.Web.CurrentUser for the current user and SPContext.Current.Site.Url to get the current URL.  I am using PeopleManager peopleManager = new PeopleManager(clientContext);   string[] profilePropertyNames = new string[] { "EmployeeNumber" }; to get the employeeNumber
 I do not know if this is the correct way to go about this or not but its all i could come up with.  The problem I am having is
PeopleManager' is an ambiguous reference between 'Microsoft.SharePoint.Client.UserProfiles.PeopleManager'
and 'Microsoft.Office.Server.UserProfiles.PeopleManager.  Is there a way to get around this?
The problem is with these two references.
Microsoft.Office.Server.UserProfiles or
Microsoft.SharePoint.Client.UserProfiles
Any help would be appreciated.

using System;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Text;
using System.Collections.Generic;
using Microsoft.SharePoint;
using Microsoft.SharePoint.Client;
using Microsoft.SharePoint.Client.UserProfiles;
using Microsoft.Office.Server;
using Microsoft.Office.Server.UserProfiles;
using Microsoft.Office.Server.Administration;
using Microsoft.SharePoint.WebControls;



namespace ABC.ABC
{
   public partial class ABCUserControl : UserControl
    {

          protected void Page_Load(object sender, EventArgs e)
        {

             SPUser currentUser = SPContext.Current.Web.CurrentUser;
             string currentServer = SPContext.Current.Site.Url;
             string currenturl = HttpContext.Current.Request.Url.ToString();
             const string serverUrl = "currentServer";
             const string targetUser = "currentUser";

            ClientContext clientContext = new ClientContext(serverUrl);
            // Get the PeopleManager object.
            PeopleManager peopleManager = new PeopleManager(clientContext);

            string[] profilePropertyNames = new string[] { "EmployeeNumber" };
            UserProfilePropertiesForUser profilePropertiesForUser = new UserProfilePropertiesForUser(clientContext, targetUser, profilePropertyNames);
            IEnumerable<string> profilePropertyValues = peopleManager.GetUserProfilePropertiesFor(profilePropertiesForUser);
            // Load the request and run it on the server.
            clientContext.Load(profilePropertiesForUser);
            clientContext.ExecuteQuery();

            // Iterate through the property values.
            foreach (var value in profilePropertyValues)
            {
                Console.Write(value + "\n");
                string a = value;

            }
          }

    }
}

Thank You