how to get area based on city using Autocomplete Extender using c# with LINQ

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LINQ

dear friends

now i want Area based(selected) on City Using AutoComplete Extender AJAX control.

i select India then only sort delhi,chennai,bangalore,Mumbai,Kolkatta,...
(only india's city)

i select America then sort newyork,wasington,lossAngles,....
(only American city).

Like that only area display while i enter text in textboxes.

Now i use 2 textboxes,


by mohan.