Update the list object using linq

Question

I have list of object's  and i want to update the the object's Break property where breakflag=1 with its next and previous record.

class EmployeeHour 

{

   int recordID{get;set;}

   string Break{get;set;}

   DateTime TimeIn {get;set;}

   DateTime TimeOut {get;set;}

   int BreakFlag{get;set;}

}

 

List<EmployeeHour> listEH=(from item in employeeHoursList

                      where item.BreakFlag==1     

                        select item).Foreach(itme=>item.Break=(employeeHoursList[i].Timeout-employeeHoursList[i].TimeIn).ToString()).ToList();

 

 

So here i just want set the break property with the Time diff. between TimeIn and  TimeOut only for those objcet whoes breakflag is one. and TimeOut of that object where BeakFlag ==1 and TimeIn next to that object in the list.

 

Thanks

Rahul.