score:0

var result = 
    from file in lof
    from prefix in f
    where file.path.startswith(prefix)
    select file.path;   // ...or just file if you want the localopenfile objects

score:1

list<localopenfile> result = 
        lof.where(file => f.any(prefix => file.path.startswith(prefix)))
           .tolist();

Related Query

More Query from same tag