How to pick online user list part by part in specific sort logic ?

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C#

SQL-Server-2008R2

Hi,

I need to list all online users, working with help of web api service. And its listing in a sort order of online user in alphabetical order after that offline users in alphabetical order. And need to pick data part by part to avoid large data transfer time like facebook scroll down updation. I picking the data part by part using linq skip() and take() methods.

What my problem affecting is my list of datas order changing time by time that one user got online or one got offline. This changing make my data picking method skip() and take() taking the same data multiple time or laps some data due lack or same order of data in adjusent data picking.

How I able to solve the problem ?