translating sql statement to linq - sql

Question

I have a working sql statement and want it as linq statement or linq methode chain.
My statement is:
SELECT T1.*
FROM (SELECT Col1, MAX(InsertDate) as Data
FROM Zugbewegungsdaten
GROUP BY Loknummer) as temp JOIN T1
ON (T1.Col1= temp.Col1
AND Zugbewegungsdaten.InsertDate= temp.Date)
WHERE Col3=1
ORDER BY Loknummer
Can anybody help me to translate it?
Edit after comment:
Ok, my result for the inner select:
var maxResult = (from data in context.T1
group data by data.Col1
into groups
select new
{
Train = groups.Key,
InsertDate= groups.Max( arg => arg.InsertDate)
}) ;
I tried the join like this:
var joinedResult = from data in context.T1
join gdata in maxResult on new
{
data.Col1,
data.InsertDate
}
equals new
{
gdata.Col1,
gdata.InsertDate
}
select data;
But i get a compiler error by the join that the typeargument are invalid.
In the case that the join works i whould use a where to filter the joinedResult.
var result = from data in joinedResult
where data.Col3 == true
select data;

Answer 1

After much more "try and error", I got this version it looks like it works.
var joinedResult = ( ( from data in context.T1
group data by data.Col1
into g
select new
{
Key= g.Key,
Date = g.Max( p => p.InsertDate)
} ) ).Join( context.T1,
temp => new
{
Key = temp.Key,
InsertDate = temp.Date
},
data => new
{
Key = data.Col1,
InsertDate = data.InsertDate
},
( temp,
data ) => new
{
temp,
data
} )
.Where( arg => arg.data.Col3)
.OrderBy( arg => arg.data.Col1)
.Select( arg => arg.data );
Could it be that i have to set the same property names (Key, InsertDate) by joins over multi columns?