Access GameObject of a static class ?

I'm trying to make a tower defense game. It's 3D but mostly viewed from above (2D).
But if I right-click the mouse the camera can zoom and roam using WASD keys. This works.

However, beside the playing field I have a sidebar where I pick which towers to build and so forth.
But when in zooming/roaming the sidebar becomes useless, so I want to hide it.

I'm trying to do that from the camera-script, so I added a script-component to the sidebar to make it static:

Code (CSharp):

1. using UnityEngine;
2. public class SideBarManager : MonoBehaviour
3. {
4.     public static SideBarManager Instance;
5.     void OnEnable() { Instance = this; }
6. }

In the camera-script I try the below to hide the sidebar (and everything on it):

Code (CSharp):

1. SideBarManager.Instance.GameObject.SetActive(false);

error CS1061: 'SideBarManager' does not contain a definition for 'GameObject' : (

 

Argh - GameObject is an instance of it's class and therefore spelled with a lowercase G:

Code (CSharp):

1. SideBarManager.Instance.gameObject.SetActive(false);