Foreach Error

Im using this code example from the unity script reference but as is there is a error and I can't tell why I get this error

http://docs.unity3d.com/Documentation/ScriptReference/GameObject.FindGameObjectsWithTag.html // C# version

foreach statement cannot operate on variables of type 'UnityEngine.Object' because 'UnityEngine.Object' does not contain a public definition for 'GetEnumerator'

my code:

 using UnityEngine;
 using System.Collections;
 
 public class Inventory : MonoBehaviour {
 
     public GameObject invslot;
     public Object invslots;
 
     void Awake()
     {
         itm = GameObject.Find("FPSPlayer").GetComponent<Item>();
         uss = GetComponent<UISlicedSprite>();
         //AddStuff();                       
     }
 
     public void CheckPanelChildren()
     {
         if (invslots == null)
             GameObject.FindGameObjectsWithTag("Invslot");
 
         foreach (Object c in invslots) // error right here
         {
         }
                  
     }
 
 }