• AsQueryAble : IQueryable<T>
  ObjectFacotry of1 = new ObjectFacotry();
   List<ObjectFacotry> listempdb = of1.cEmp();
  var query1 = of1.cEmp().AsQueryable().Select(e => e.empno == 7902);
• AsEnumerable()
  ObjectFacotry of1 = new ObjectFacotry();
   List<ObjectFacotry> listempdb = of1.cEmp();
   

• List<ObjectFacotry> listempdb = of1.cEmp();
  List<string> eList = new List<string>();
• Using foreach loop
  foreach (var v1 in listempdb)
  { eList.Add(v1.ename + " " + v1.job + " \t" + v1.deptno); }

Please also review this example : LINQ_IEnumerable_AsEnumerable1.cs

• List<ObjectFacotry> listempdb = of1.cEmp();
  ArrayList ar1 = new ArrayList();
• foreach (var v1 in listempdb)
  { ar1.Add(v1.ename + " " + v1.job + " \t" + v1.deptno);}
  read(ar1, "\n");