asp.net - Updating an item using LINQ -

i wish update item using linq. tried query.

string option = "new value here";  (jt.summaryspecs.select(x => x.docspecs)     .firstordefault()     .where(         y => y.delitemid == docspc.delitemid &&         y.itemcode == docspc.itemcode     )     .firstordefault().finishingoptionsdesc[0] ) = option; 

i wish update value of "finishingoptiondesc," collection of string values wish update 1st one.

but code above not working.

the classes attributes:

"summaryspecs.cs"     public docspec[] docspecs { get; set; }  "docspecs.cs"     public string[] finishingoptionsdesc { get; set; } 

---

my concern update finishingoptiondesc 1st string.

thanks

the part of code prevents snippet working select(/*...*/) method. creates new reference , takes execution out of expression tree object context.

you have write this:

jt.summaryspecs .where(y =>      y.docspecs.first().delitemid = docspc.delitemid     && y.docspecs.first().itemcode == docspc.itemcode) .first().docspecs.first().finishingoptionsdesc.first() = option; 

it not beautyfull, way achieve goal. more pretty code use qes:

(from item in jt.summaryspecs let searchitem = item.docspecs.first() searchitem.delitemid = docspc.delitemid && searchitem.itemcode = docspc.itemcode select item) .first().docspecs.first().finishinoptionsdesc.first() = option; 

this way ensures, "do not leave expression tree" until end of statement, can modify reference directly, without loosing given data.