Can i use PLINQ with LINQ cross join when there is huge data

[Sudip_inn]

var combo = from p in people.AsParallel()
from c in cars.AsParallel()
.Select(x => ExpensiveFunc(x));

again ExpensiveFunc(x) iterate in huge data and update global datatable
Can i use PLINQ with LINQ cross join when there is huge data ? does it impact the performance gain ?

if anything bad may occur then please give me a alert.

thanks

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