pivoting LINQ containing special characters (like plus or minus) in VB.NET

Question

Suppose I have the following table

    name testID Value
    John Glu    4.3
    John Ket    2.1
    John Cl-    3.2
    Mary Glu    4.3
    Mary Na+    4.2
    Mary Cl-    6.9
    Pete Na+    N/A
    Pete Cl-    3.1

The LINQ query should pivot as follows

    Name  Glu Ket Na+ Cl-
    John  4.3 2.1 NUL 3.2
    Mary  4.3 NUL 4.2 6`.9
    Pete  NUL NUL N/A 3.1

Whilst I understand how this can be done with SQL, but I have no clue how to do this with LINQ (especially if field containing plus, underscore or minus signs) First of all, I was wondering if this is even possible do this in LINQ (with plus or minus signs) with VB.NET, if so can someone point us to the right direction please?

Many thanks

EDITED

The linq I wrote kind of half works without the Na+ or Cl- part:

 from f in (from r in results group r by r.name into group )  _
 let a as object = _
 (From e in f.Group where e.testID= "Glu" select e.Value).max _
 let b as object = _
 (From e in f.Group where e.testID= "Ket" select e.Value).max _
 let c as object = _
 (From e in f.Group where e.testID= "Na+" select e.Value).max _
 let d as object = _
 (From e in f.Group where e.testID= "Cl-" select e.Value).max _
 select f.name, Glu = a, Ket = b, [Na+] = c, [Cl-] = d

substituting

      [Na+] = c , [Cl-] = d

with

     Na = c , Cl = d
    

it will work as expected, but is there a way have plus or minus sign display on the column header?