c# - return a multidimensional json array using json.net -

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i have code:

var all_books = db.books; var result = all_books.select(a => new { a.bookid, a.booktitle, a.bookisbn}).take(4).tolist();  var jsondata = new {                 secho = param.secho,                 itotalrecords = all_assets.count(),                 itotaldisplayrecords = all_assets.count(),                 aadata = result             }; return json(jsondata,jsonrequestbehavior.allowget);

and json returned in form of:

{"secho":null,"itotalrecords":2764,"itotaldisplayrecords":2764,"aadata":[{"bookid":"m-711745","booktitle":"20844","bookisbn":"hp la2205wg"},{"bookid":null,"booktitle":"n/a","bookisbn":"n/a"},{"bookid":"m-710587","booktitle":"20707","bookisbn":"hp la2205wg"},{"bookid":"735129","booktitle":"21272","bookisbn":"hp la2205wg"}]}

i return multidimensional array instead.

{"secho":null,"itotalrecords":2764,"itotaldisplayrecords":2764,"aadata":[["bookid":"m-711745","booktitle":"20844","bookisbn":"hp la2205wg"],["bookid":null,"booktitle":"n/a","bookisbn":"n/a"],["bookid":"m-710587","booktitle":"20707","bookisbn":"hp la2205wg"],["bookid":"735129","booktitle":"21272","bookisbn":"hp la2205wg"]]}

i have tried code: 

var result = all_books.select(a => new list<string[]>() { new string[]{ a.bookid, a.booktitle, a.bookisbn }}).take(4);

but error:

the array type 'system.string[]' cannot initialized in query result. consider using 'system.collections.generic.list`1[system.string]' instead.

what missing?

try this:

var result = all_books     .select(a => new list<string> { a.bookid, a.booktitle, a.bookisbn })     .take(4)     .tolist();

when serialize it, should following json, think shooting for:

{     "secho":null,     "itotalrecords":2764,     "itotaldisplayrecords":2764,     "aadata":     [         ["m-711745","20844","hp la2205wg"],         [null,"n/a","n/a"],         ["m-710587","hp la2205wg","20707"],         ["735129","hp la2205wg","21272"]     ] }

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