When convert var nextid to integer get error how to solve error

System.InvalidCastException: 'Unable to cast object of type 'Microsoft.EntityFrameworkCore.Query.Internal.EntityQueryable`1[System.Int32]' to type 'System.IConvertible'.'

int NextIdValue = Convert.ToInt32(nextID);

<pre>  public ActionResult Next(int id)
        {
            var nextID = _context.GetAll().OrderBy(i => i.EmployeeId)
                     .SkipWhile(i => i.EmployeeId != id)
                     .Skip(1)
                     .Select(i => i.EmployeeId);
            
            ViewBag.NextID = nextID;
           int NextIdValue = Convert.ToInt32(nextID);
            return View("Create", new Employee { EmployeeId = NextIdValue });
         
        }