Linq Multiple Joins - Name Not In Scope

Here are the tables:

tblEmp: EMPID  EMPCODE GRADEID
	-------------------------
  	1     c1       g1
  	2     c2       g2

tblGrade: GRADEID LEAVEID  DAYS
	  -------------------------
  	  g1      l1       10  
  	  g1      l2       20
  	  g2      l1       30

tblLeave: LEAVEID   LEAVECODE
	 ------------------------
  	    l1       al
  	    l2       cl
  	     l3       ml 

I would like to get the leavecodes based on empcode. So the sql would be

select g.leaveid,l.leavecode,g.days
from tblemp e
join tblgrade g on e.gradeid = g.gradeid
join tblleave l on g.leaveid = l.leaveid
where e.empcode='c1'

Desired result:

LEAVEID LEAVETYPE  DAYS
-------------------------
l1        al        10
l2        cl        20

This code gives an error - 'The name 'g' is not in scope on the left side of equals.Consider swapping the expressions on either side of equals.

public DataTable GetData()
{
 var qry = from e in DB.tblemp.where(e=>e.empcode=='c1')
           join g in DB.tblgrade on e.gradeid equals g.gradeid
           join l in DB.tblleave on g.leaveid equals l.leaveid //error here at g.leaveid
           select new
            {
              leaveid = g.leaveid,
              leavecode = l.leavecode ?? string.empty,
              days = g.days ?? 0.0
            };
    DataTable dt = new DataTable();
    dt = qry.ToDataTable();
    return dt;
}