How to serialize JSON object array with 2 or more items in vb.net -

i'm having trouble creating json object dimensional array.

see code i'm using, , if can, please me

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output string json object:

    {       "title":"the title",       "subtitle":"some subtitle here",       "category_id":"your category",       "price":10,       "currency_id":"real",       "available_quantity":1,       "buying_mode":"buy_it_now",       "listing_type_id":"bronze",       "condition":"new",       "description": "description",       "video_id": "youtube_id_here",       "warranty": "12 months",       "pictures":[         {"source":"http://www.yourimage/1.jpg"},         {"source":"http://www.yourimage/2.jpg"},         {"source":"http://www.yourimage/3.jpg"}       ]     } 

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json class:

generated http://jsonutils.com/

 public class picture     public property source string end class  public class newitem     public property title string     public property subtitle string     public property category_id string     public property price integer     public property currency_id string     public property available_quantity integer     public property buying_mode string     public property listing_type_id string     public property condition string     public property description string     public property video_id string     public property warranty string     public property pictures() picture end class 

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using class generate json object:

    dim itempost new postitem()                 itempost.title = "não compre isso é apenas um teste"                 itempost.subtitle = "sub título"                 itempost.category_id = "mlb42369"                 itempost.price = 100                 itempost.currency_id = "brl"                 itempost.available_quantity = 1                 itempost.buying_mode = "buy_it_now"                 itempost.listing_type_id = "gold_special"                 itempost.condition = "new"                 itempost.description = "descrição produto"                 itempost.video_id = "https://www.youtube.com/watch?v=gta9hu6m0hk"                 itempost.warranty = "jesus cristo"                 **'here in trouble**                 itempost.pictures = new string() {"http://www.yourimage/1.jpg", ""http://www.yourimage/2.jpg""}                 messagebox.show(jsonconvert.serializeobject(itempost).tostring) 

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already tried in many ways, without success. sorry language errors, used google translator

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edit:

i'm moving forward. follows code:

dim itempost new postitem() {              .title = "não compre isso é apenas um teste",             .category_id = "mlb42369",             .price = 100,             .currency_id = "brl",             .available_quantity = 1,             .buying_mode = "buy_it_now",             .listing_type_id = "gold_special",             .condition = "new",             .description = "descrição produto",             .video_id = "https://www.youtube.com/watch?v=gta9hu6m0hk",             .warranty = "jesus cristo",             .pictures = new picture() {             .source = ""             }            } 

messagebox.show(jsonconvert.serializeobject(itempost, formatting.indented))

follows output json:

{   "title": "não compre isso é apenas um teste",   "category_id": "mlb42369",   "price": 100,   "currency_id": "brl",   "available_quantity": 1,   "buying_mode": "buy_it_now",   "listing_type_id": "gold_special",   "condition": "new",   "description": "descrição produto",   "video_id": "https://www.youtube.com/watch?v=gta9hu6m0hk",   "warranty": "jesus cristo",   "pictures": {     "source": ""   } } 

the thing missing changing syntax:

"pictures": {         "source": ""       } 

for:

"pictures": [        {           "source": ""     }       ] 

congulations, rigth.

see how code became

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class code

public class picture     public property source string end class    public class postitem      public property title string     public property category_id string     public property price integer     public property currency_id string     public property available_quantity integer     public property buying_mode string     public property listing_type_id string     public property condition string     public property description string     public property video_id string     public property warranty string     public property pictures list(of picture) end class 

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code serialization

dim itempost new postitem() {              .title = "não compre isso é apenas um teste",             .category_id = "mlb42369",             .price = 100,             .currency_id = "brl",             .available_quantity = 1,             .buying_mode = "buy_it_now",             .listing_type_id = "gold_special",             .condition = "new",             .description = "descrição produto",             .video_id = "https://www.youtube.com/watch?v=gta9hu6m0hk",             .warranty = "jesus cristo",             .pictures = new list(of picture) {                 new picture() {                     .source = "foto 1"},                 new picture() {                     .source = "foto 2"}             }         } 

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output json string

{   "title": "não compre isso é apenas um teste",   "category_id": "mlb42369",   "price": 100,   "currency_id": "brl",   "available_quantity": 1,   "buying_mode": "buy_it_now",   "listing_type_id": "gold_special",   "condition": "new",   "description": "descrição produto",   "video_id": "https://www.youtube.com/watch?v=gta9hu6m0hk",   "warranty": "jesus cristo",   "pictures": [     {       "source": "foto 1"     },     {       "source": "foto 2"     }   ] }