in C# ineed2 get the table from sql by selecting date&time

Question

hai
    i am a fresher and i need to do a project in that i need to fetch the data from the sql database and display by c# coding, everything is done perfectly but i got stuck in the part of fetching the data from the table in accordance with two values ie( the table from the date and time entered ex: start values in table should be the first date and time and the last value in the table should be the second date and time )plz if u have any demo code or any other ref please help