Unity thinks one of my variables is a System.type

I am creating an inventory system and I need to find out the item type of an item but in my if statement it keeps thinking that one of my variables is a System.type when it is not it is in line 106. This is what it says : Assets/Scripts/Inventory/Inventory.js(106,83): BCE0051: Operator '==' cannot be used with a left hand side of type 'System.Type' and a right hand side of type 'Item.ItemGroup'.

import System.Collections.Generic;

     //Backdrops
     private var invBackDrop : Texture2D;
     private var equipBackDrop : Texture2D;
     //Backdrops end
     
     //Windows detail
     private var windowPosition : Vector2 = Vector2(0,0);
     private var windowSize : Vector2 = Vector2(Screen.width, Screen.height);
     //Windows detail end
     
     private var windowRectangle : Rect = new Rect(windowPosition.x, windowPosition.y, windowSize.x, windowSize.y);
     
     
     
     //GameObjects
     var player : GameObject;
     private var gameManager : GameObject;
     //GameObjects End
     
     //Script Components
     //var playerMotor : UnityStandardAssets.Characters.FirstPerson.FirstPersonController;
     private var items : ItemCreator;
     private var equipmentManager : EquipmentManager;
     //Script Components End
 
     //Main Inventory List
     var MainInventoryList : List.<Item> = new List.<Item>();
     
     private var Group : Item.ItemGroup;
     //Main Inventory List End
     
     
 
     //displaying screens
     private var display : boolean = false;
     
     //When clicking buttons to display equipment screen
     private var displayEquipScreen : boolean = false;
     
     //When clicking butttons to display inventory screen
     private var displayInvScreen : boolean = true;
 
     // Use this for initialization
     function Start () 
     {
         Screen.lockCursor = true;
         Cursor.visible = false;
     
         invBackDrop = Resources.Load("Background/InventoryBackground", Texture2D);
         equipBackDrop = Resources.Load("Background/EquipmentBackground", Texture2D);
         
         player = GameObject.FindGameObjectWithTag("Player");
         gameManager = GameObject.FindGameObjectWithTag("GameManager");
         items = gameManager.GetComponent(ItemCreator);
         equipmentManager = gameManager.GetComponent(EquipmentManager);
         
         
         
         
         //playerMotor = player.GetComponent(FirstPersonController);
         
         
     }
     
     // Update is called once per frame
     function Update () 
     {
         //when you press e it will bring up inventory screen 
         if(Input.GetKeyDown(KeyCode.E) && !display)
         {
             
             display = true;
             Screen.lockCursor = false;
             Cursor.visible = true;
             
         }else if (Input.GetKeyDown(KeyCode.E) && display)
         {
             display = false;
             Screen.lockCursor = true;
             Cursor.visible = false;
         }
         
     }    
     function OnGUI()
     {
         if(display)
         {
             if(displayInvScreen)
             {
                 if(GUI.Button(Rect(Screen.width / 2, Screen.height / 2 + 50, 120, 20), "Equipment"))
                 {
                     
                     displayEquipScreen = true;
                     displayInvScreen = false;
                 }
                 
                 GUI.DrawTexture(windowRectangle, invBackDrop, ScaleMode.StretchToFill);
                 for(var x = 0; x < MainInventoryList.Count; x++)
                 {
                     
                     if(GUI.Button(Rect(Screen.width / 2 - 350, Screen.height / 2 - (x * 50), 90, 50), GUIContent(" " + MainInventoryList[x].name , MainInventoryList[x].icon)))
                     {
                     
                     106:     if(MainInventoryList[x].ItemGroup == Group.light)
                         {
                         
                         }
                         //if(MainInventoryList[x].ItemGroup == MainInventoryList[x].ItemGroup.light)
                         //{
                         //    print("We have reached the equipment stage");
                             //This will make it so that when you equip an item to a slot that is already full then it will equip the item and get the other item and put it in the main Inventory
                         //    if(equipmentManager.equipmentList[0].equipped)
                         //    {
                         //        MainInventoryList.Add(equipmentManager.equipmentList[0]);
                         //        equipmentManager.equipmentList[0] = MainInventoryList[x];
                         //        equipmentManager.equipmentList[0].equipped = true;
                                 
                         //    }    
                                 //if there is nothing there do this
                         //        equipmentManager.equipmentList[0] = MainInventoryList[x];
                         //        MainInventoryList.RemoveAt(x);
                         //        equipmentManager.equipmentList[0].equipped = true;
                                                             
                         //}else if(MainInventoryList[x].ItemGroup.food)
                         //{
                         
                         //}
                     }
                 }
         
             }
             if(displayEquipScreen)
             {
                 GUI.DrawTexture(windowRectangle, equipBackDrop, ScaleMode.StretchToFill);
                 
                 if(GUI.Button(Rect(Screen.width / 2, Screen.height / 2 - 80, 120, 20), "Inventory"))
                 {
                     displayEquipScreen = false;
                     displayInvScreen = true;
                 }
             }
         
             if(GUI.Button(Rect(Screen.width / 2, Screen.height / 2 + 50, 120, 20), "Equipment"))
             {
                 displayEquipScreen = true;
                 displayInvScreen = false;
             }
             
             
         }
     }