public static void ShowWindow()
        {
            InventorySystemEditor[] objArray = Resources.FindObjectsOfTypeAll <InventorySystemEditor> ();
            InventorySystemEditor   editor   = (objArray.Length <= 0 ? ScriptableObject.CreateInstance <InventorySystemEditor> () : objArray [0]);

            editor.hideFlags    = HideFlags.HideAndDontSave;
            editor.minSize      = new Vector2(690, 300);
            editor.titleContent = new GUIContent("Inventory System");

            editor.Show();
        }