Question

this is the code i used in my application but i am confused with the need of a ilist interface over here and the use of iqueryable. what are they exactly defined for?

private IList<Emp2> getcountry()
        {
            IList<Emp2> countryList = null;
            using (CountryDataContext context = new CountryDataContext(ConnectionString))
            {
              IQueryable<Emp2> query = from c in context.Emp where c.EmpName=="ss"select c;
                countryList = query.ToList();
            }

            return countryList;
        }

Answer 1

They are both interfaces.

Interfaces in C#:

http://www.codeproject.com/Articles/18743/Interfaces-in-C-For-Beginners

http://www.codeproject.com/Articles/10197/The-Interface-Construct-in-C

msdn links:

http://msdn.microsoft.com/en-us/library/ms173156.aspx

http://msdn.microsoft.com/en-us/library/system.collections.ilist.aspx

http://msdn.microsoft.com/en-us/library/system.linq.iqueryable.aspx