how to join two different JSON into single JSON in C# -

my first json follows

[{     "userid": 4,     "firstname": "rupesh",     "lastname": "abc",     "email": "abc@gmail.com",     "gender": "male" }] 

my second json follows

 [{     "accountid": 2,     "accountname": "rupeshinfo",     "accountdomain": null,     "roleid": 1,     "userid": 4 }, {     "accountid": 3,     "accountname": "rameshinfo",     "accountdomain": null,     "roleid": 2,     "userid": 4 }] 

the result must be

{     "userdetails": [{         "userid": 4,         "firstname": "rupesh",         "lastname": "abc",         "email": "abc@gmail.com",         "gender": "male"     }],     "accountdetails": [{         "accountid": 2,         "accountname": "rupeshinfo",         "accountdomain": null,         "roleid": 1,         "userid": 4     }, {         "accountid": 3,         "accountname": "rameshinfo",         "accountdomain": null,         "roleid": 2,         "userid": 4     }]  } 

if don't want mess string inserts can go (and recommend so) using dynamic objects:

            var javascriptserializer = new javascriptserializer();             var userdetails = javascriptserializer.deserializeobject(json1);             var accountdetails = javascriptserializer.deserializeobject(json2);              var resultjson =  javascriptserializer.serialize(new {userdetails = userdetails, accountdetails = accountdetails});