Entity Framework ObjectContext re-usage

Question

I\'m learning EF now and have a question regarding the ObjectContext:

Should I create instance of ObjectContext for every query (function) when I access the database

Answer 1

public class DBModel {

        private const string _PREFIX = "ObjectContext";

        // DBModel.GetInstance();
        public static ObjectContext GetInstance() {
            var key = CreateKey();
            HttpContext.Current.Items[key] = HttpContext.Current.Items[key] ?? Activator.CreateInstance();
            return HttpContext.Current.Items[key] as ObjectContext;
        }

        private static string CreateKey() {
            return string.Format("{0}_{1}", _PREFIX, typeof(T).Name);
        }
    }