Change Context Webservice using Visual Studio 2013

I created a webservice using visual studio 2013, mysql using database first, until then okay, but when I put it to generate in json, the answer stays as follows:

  

string xmlns="http://digits.com.br/" >   {"PAR_ID_23": 2, "PAR_RAZAO_SOCIAL_23": "GILVAN JOAO DA SILVA", "PAR_SENHA_MOBILE_23": "12", "PAR_MOBILE_23": null}   

But when I go I want the return to be:

  

{"Android": [{"PAR_ID_23": 2, "PAR_RAZAO_SOCIAL_23": "GILVAN JOAO DA SILVA", "PAR_SENHA_MOBILE_23": "12", "PAR_MOBILE_23": null}]} >

I found this example:

       [WebMethod]
        [ScriptMethod(UseHttpGet = true, ResponseFormat = ResponseFormat.Json)]
        public void HelloWorld()
        {
            // return "Hello World";
            JavaScriptSerializer js = new JavaScriptSerializer();
            Context.Response.Clear();
            Context.Response.ContentType = "application/json";
            RegSuMsg data = new RegSuMsg();
            data.Message = "Hello world !";
            Context.Response.Write(js.Serialize(data));
        }
    }

    public class RegSuMsg
    {
        public String Message;
    }

That works however I can not adapt it to my function because it uses classes:

[WebMethod]
    public string ConsultarParceirosTodos()
    {
        try
        {
            NegLogin negLogin = new NegLogin();
            List<parceiro_23> colecao = new List<parceiro_23>();
            JavaScriptSerializer jsSerializer = new JavaScriptSerializer();
            string json = string.Empty;

            colecao.AddRange(negLogin.ConsultarParceiroTodos());
            json = jsSerializer.Serialize(colecao);
            return json;
        }
        catch (Exception ex)
        {
            throw new Exception(ex.Message);
        }

    }

I tried to adapt it in several ways but the return is always imcompatable, if I take the return I leave the Context.Response.Write (js.Serialize (date)), also of the error in the execution.