hi every one
if i have two list<string>
for example
list: list1
a,b,c,d,d,v,b,a
and
list: list2
a,b,d
how can i find index of element list2 in list1
i mean the result is
0,1,3,4,6,7
note:
my first list contains at lest 500000 element
and second list about 3000 element
so i problem is time
thanks to all very much