Sql query to linq convert - sql

Question

Can anyone help me to translate my sql query to linq? I am not so good in linq can anyone help me out with it please .
select
s.UploadFilename ,
a.ID,
isnull(s.Status_id,1) as 'Status_id' ,
a.CaseID,
a.RecordType,
a.ColumnName,
a.FieldName,
a.OldValue,
a.NewValue,
a.ModifiedBy,
A.ModifiedOn,
isnull(u.UserName,'') as 'UserName'
from [dbo].[AuditTrail] as A
left join Case_Status as s
on s.Case_Id=A.CaseID
left join [dbo].[User] as u
on a.ModifiedOn =u.UserID
where A.CaseID=5338

Answer 1

This is not the answer, my query is big, it was not accepting this query as comment.
This query is not returning records :
var AuditTrailFile = (from AT in db.AuditTrails
join ATCS in db.AssnAuditTrailCaseStatus
on new {ID = AT.ID} equals new { ID = (int)(ATCS.AuditTrialID) }
into ATCS_join
from ATCS in ATCS_join.DefaultIfEmpty()
join CS in db.Case_Status on new { Case_StatusId = (int)(ATCS.CaseStatusID) }
equals new { Case_StatusId = CS.Case_StatusId } into CS_join
from CS in CS_join.DefaultIfEmpty()
where
AT.CaseID == CaseID
orderby
AT.ModifiedOn descending
select new
{
ID = (int?)AT.ID,
Case_StatusId = CS.Case_StatusId != null ? CS.Case_StatusId : 1, //Case_StatusId comes for row whose FieldName=Status Else No Case_StatusId
AT.CaseID,
AT.RecordType,
AT.ColumnName,
AT.FieldName,
AT.OldValue,
AT.NewValue,
AT.ModifiedBy,
UserName = AT.User != null ? AT.User.UserName : "",
AT.ModifiedOn,
UploadFilename = CS.UploadFilename
}).ToList();