Exception while executing LINQ query

i am developing this in ASP.NET MVC2

Getting exception:

Object reference not set to an instance of an object

System.NullReferenceException was unhandled by user code
  Message="Object reference not set to an instance of an object."
  Source="Anonymously Hosted DynamicMethods Assembly"
  StackTrace:
       at lambda_method(ExecutionScope , TrusteeMaster )
       at System.Linq.Enumerable.WhereSelectEnumerableIterator`2.MoveNext()
       at System.Linq.Buffer`1..ctor(IEnumerable`1 source)
       at System.Linq.Enumerable.ToArray[TSource](IEnumerable`1 source)
       at LexEyeSystem.Controllers.TrusteeMasterController.JsonContractCollection(Int32 page, Int32 rows, String sidx, String sord) in D:\ParallelMinds\Projects\LexEye\Controllers\TrusteeMasterController.cs:line 560
       at lambda_method(ExecutionScope , ControllerBase , Object[] )
       at System.Web.Mvc.ActionMethodDispatcher.Execute(ControllerBase controller, Object[] parameters)
       at System.Web.Mvc.ReflectedActionDescriptor.Execute(ControllerContext controllerContext, IDictionary`2 parameters)
       at System.Web.Mvc.ControllerActionInvoker.InvokeActionMethod(ControllerContext controllerContext, ActionDescriptor actionDescriptor, IDictionary`2 parameters)
       at System.Web.Mvc.ControllerActionInvoker.<>c__DisplayClassd.<InvokeActionMethodWithFilters>b__a()
       at System.Web.Mvc.ControllerActionInvoker.InvokeActionMethodFilter(IActionFilter filter, ActionExecutingContext preContext, Func`1 continuation)
  InnerException: 

I am trying to show jqgrid, for that purpose I have to write this JSON returning action, which contains my this Linq query. Same query running properly on other pages :

var jsonData = new 
{ 
    total = totalPages, 
    page = page, 
    records = totalRecords, 
    rows = ( 
          from s in sortedList 
          select new 
          { 
              cell = new string[] {                开发者_运维技巧         
                "TrustContract/Edit/"+ s.TrusteeId.ToString(),                           
                s.FullName,
                s.OtherName.ToString(),
                s.FatherName,
                s.TrusteeGender,
                s.ResidentialAddress, 
                s.CommunicationAddress,
                s.Occupation,
                s.Nationality,
                s.DateOfBirth.Value.ToShortDateString(),
                s.PlaceOfBirth,
                s.TelephoneNumber,
                s.FacsimileNumber,
                s.MobileNumbers,
                s.EmailId,
                s.ElectionIdCardNumber,
                s.PANCardNumber,
                s.TaxRegistrationNumber,
                s.Qualification,
                s.ExperienceInYears.ToString(),
                s.Resume.ToString(), 
                "DisclousureInterestDetails/Index/"+ s.TrusteeId.ToString(),//+"?trusteeId="+s.TrusteeId.ToString(), 
                "ForeignDetail/Create/"+ s.TrusteeId.ToString(),
                "InterestedOtherCompanyInformation/Index/"+ s.TrusteeId.ToString(), 
                "RelativesDetails/Index/"+ s.TrusteeId.ToString() 

            }
          }).ToArray()
};

But why it should not running here?

Edit: LINQ query to get sortedList:

var sortedList = objTrusteeMasterList
                    .AsQueryable()
                    .OrderBy(orderBy) // Uses System.Linq.Dynamic library for sorting
                    .Skip(pageIndex * pageSize)
                    .Take(pageSize);

Check if the sortedList in you from s in sorteList is NULL or not.

I think the exception is thrown when LINQ calls MoveNext method on sortedList.

I had the same problem. If I call to the ToArray() method after

from s in sortedList 
          select new ...

I also got an exception. The problem were the calls to ToString(). If the element was null it would fail.