I need to use left outer join in entity framework method based

id    A
1     10
2     12
3     -2
4     10
5     5
6     3
7     3
8     5

id
1
2
3
4
5
6
7
8
9
10
11
12

id    A
1     10
2     12
3     -2
4     10
5     5
6     3
7     3
8     5
9     0
10    0
11    0
12    0