Hi Maryam
No matters if you are using ASP for your navigation, the main thing to care about is that your website output html should be W3 friendly for that purpose you can run any any W3 recommended HTML validation tool either online or any desktop application, Make fix all the recommendations you will get at the end and for sure Search engine will not have any problem for good results of your navigational areas.
Regards
Yamin Malik
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Yamin Malik
SEO, E-Marketer
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