linq circular query reference c# on Category and Parent Category

Question

The category table have a circular reference to have an unlimited hierarchy structure. Herewith is the structure im trying to achieve. How do I write a query in linq C# to achieve the following structure ?

Automotive - vehicle hire 
           - Vehicle Sales
Tyre's And Shocks - Tyres  - dunlop
                           - continental
                  - Shocks - Gabriel
                           - No Name

var category = _context.Category.Where(c.ParentCategoryId == 11).ToList();

Table Structure :

CategoryID	ParentCategoryID	CategoryName
1	null	Automotive
2	1	Vehicle Hire
3	1	Vehicle Sales
4	1	Spares or Accessories
5	1	Automotive Associations
6	1	Financial Institutions
7	1	Health Care
8	1	Panelbeaters
9	1	Auto Glass
10	1	Mags or Rims
11	1	Tyre's And Shocks
12	11	Tyres
13	11	Shocks
14	11	Exhausts
15	11	Suspension Springs
16	12	Dunlop
17	12	Continental
18	13	Gabriel
19	13	No Name