C#: Is it possible to declare a local variable in an anonymous method?

IQueryable<Enquiry> linq = db.Enquiries;

if(...) linq = linq.Where(...);

if(...) linq = linq.Where(e =>
    (x <= (from p in db.Orders where p.EnquiryId == e.Id select p).Count() &&
        (from p in db.Orders where p.EnquiryId == e.Id select p).Count() <= y));

if(...) linq = linq.Where(...);

var result = (from e in linq select e);

x => { int y = x + 1; return x + y; }

delegate(int x) {
     int y = x + 1;
     return x + y;
 }

... = linq.Where(e => {
         var count = (from p in db.Orders where p.EnquiryId == e.Id select p).Count();
         return x <= count && count <= y;
  });

... = from e in linq
      let count = (from p in db.Orders where p.EnquiryId == e.Id select p).Count()
      where (x <= count) && (count <= y)
      select e;

where (x <= count) && /* <= */ (count <= y);

public static Boolean Between(this int value, int from, int to)
        {
            return from <= value && value <= to;
        }

(count => x <= count && count <= y)
  ((from p in db.Orders
    where p.EnquiryId == e.Id
    select p).Count())