I use Linqer to convert SQL to LinQ but result are not the same
My SQL query :

```
    Select ChuyenNganh.ChuyenNganhID,ChuyenNganh.TenChuyenNganh,SoLuong= count(BaiBao.ChuyenNganhID )
from BaiBao right join ChuyenNganh on ChuyenNganh.ChuyenNganhID = BaiBao.ChuyenNganhID
group by  ChuyenNganh.ChuyenNganhID, ChuyenNganh.TenChuyenNganh

```

Convert to Linq

```
var queryChuyenNganh = from t in myPhanLoaiTaiLieuDataContext.ChuyenNganhs
                                   join t0 in myPhanLoaiTaiLieuDataContext.BaiBaos on new { ChuyenNganhID = t.ChuyenNganhID } equals new { ChuyenNganhID = Convert.ToInt32(t0.ChuyenNganhID) } into t0_join
                                   from t0 in t0_join.DefaultIfEmpty()
                                   group t by new
                                   {
                                       t.ChuyenNganhID,
                                       t.TenChuyenNganh
                                   } into g
                                   select new
                                   {
                                       ChuyenNganhID = (System.Int32)g.Key.ChuyenNganhID,
                                       g.Key.TenChuyenNganh,

                                       SoLuong  =(Int32)g.Count()
                                   };

```

Result: 

**Linq**

![enter image description here](https://i.stack.imgur.com/Bz05P.png)

**SQL**

![enter image description here](https://i.stack.imgur.com/C51ui.png)

Who can fix it for me?