Using ConvertAll in Generic List

var result = Context.User.Where(p => p.ID == UserID && p.Withdrawal == null).Select(c=>c.Deposit).ToList().ConvertAll<decimal>(x=>Convert.ToDecimal(x)).Sum(c => c);
 

Adding Integers to List

List<int> li = new List<int>();
li.Add(1);
li.Add(0);
li.Add(1);
li.Add(200);
li.Add(20);
li.Add(3);
li.Add(100);
li.Add(12);
if (li.Contains(0))
{

}
if (li.Contains(10))
{

}
if (li.Contains(2))
{

}

EntityFunction for adding days

EntityFunctions.AddDays(DateTime? DateValue, int? intValue)) in Entity FrameWork
 

Entity framework include for child table

var widgetDTO = DBContext.test_widget                    .Include("test_Parent.test_Child").Where(p => p.ID == wID).ToList();


In the above code  ".Include("test_Parent.test_Child")" ---
test_Child is the child table and
test_Parent Parent table.