c# array query

I am executing stored procedures in my project WCF C#. From one of my SP I receive something like this:

CeldaId
CeldaIndicadorCodigo
CeldaIndicadorTipoCodigo

Then with the value of Celda IdI call another SP that brings me:

CeldaKeyCodigo
CeldaKeyValor

From the first SP I get CeldaIdand with that value I get the results of the second SP.

My idea is from my service to deliver an array JSONmore or less with this structure

Celdas : [
     IndicadorCodigo : [
          {
              CeldaKeyCodigo : valor,
              CeldaKeyValor : valor
          },
          {
              CeldaKeyCodigo : valor,
              CeldaKeyValor : valor
          }
     ]
]

That is, group the values ​​of the query of my second SP by the value that IndicatorCodigo has.

The way I did it was the following... I created a class called Cell with the fields named above plus a List of a class called CellKeyVal with the fields returned by my second SP.

public class Celda
{
    [DataMember]
    public int celda_id { get; set; }
    [DataMember]
    public int celda_indicador_codigo { get; set; }
    [DataMember]
    public int celda_indicador_tipo_codigo { get; set; }
    [DataMember]
    public List<CeldaKeyVal> valores_celda { get; set; }
}


public class CeldaKeyVal
{
    [DataMember]
    public string celda_key_codigo { get; set; }
    [DataMember]
    public string celda_key_valor { get; set; }
}

After having this structure, I go through the results like this:

public ListaCeldas GetCheckIn(int gsalid) 
{
    SqlConnection conn = new SqlConnection(Db);
    List < Celda > celdas = new List < Celda > ();
    ListaCeldas listaCeldas = new ListaCeldas();
    try {
        SqlCommand cmd = new SqlCommand("MBL_SEL_CELDAS", conn);
        cmd.CommandType = CommandType.StoredProcedure;
        cmd.Parameters.AddWithValue("gsalid", gsalid);
        conn.Open();
        cmd.ExecuteNonQuery();
        DataTable dtCelda = new DataTable();
        dtCelda.Load(cmd.ExecuteReader());
        foreach(DataRow dr in dtCelda.Rows) {
            Celda celda = new Celda();
            celda.celda_id = Convert.ToInt32(dr["CeldaId"]);
            celda.celda_indicador_codigo = Convert.ToString(dr["CeldaIndicadorCodigo"]);
            celda.celda_indicador_tipo = Convert.ToString(dr["CeldaIndicadorTipoCodigo"]);
            DataTable dtCeldasKey = new DataTable();
            SqlCommand cmd_celdas_key = Helper.GetCeldaValoresKey(celda.celda_id);
            dtCeldasKey.Load(cmd_celdas_key.ExecuteReader());
            List < CeldaKeyVal > listaCeldaKey = new List < CeldaKeyVal > ();
            foreach(DataRow drCeldasKey in dtCeldasKey.Rows) {
                CeldaKeyVal celda_key_val = new CeldaKeyVal();
                celda_key_val.celda_key_codigo = Convert.ToString(drCeldasKey["CeldaKeyCodigo"]);
                celda_key_val.celda_key_valor = Convert.ToString(drCeldasKey["CeldaKeyValue"]);
                listaCeldaKey.Add(celda_key_val);
            }
            celda.valores_celda = listaCeldaKey;
            celdas.Add(celda);
        }
        List < Celda > cl = celdas.OrderBy(c => c.celda_indicador_codigo).ToList();
        listaCeldas.celdas = cl;
        if (celdas.Count > 0) {
            listaCeldas.status = 1;
        }
    } catch (Exception e) {
        listaCeldas.status = 0;
    } finally {
        conn.Close();
    }

    return listaCeldas;
}

This works fine for me but not the order I want, this is the JSON I get

{
  "GetCheckInResult": {
    "celdas": [
      {

        "celda_id": 1,
        "celda_indicador_codigo": "I001",
        "celda_indicador_tipo": "T01",
        "valores_celda": [
          {
            "celda_key_codigo": "CODIGO",
            "celda_key_valor": "CHECK1"
          },
          {
            "celda_key_codigo": "IMAGEN",
            "celda_key_valor": "L76nD.jpg"
          },
          {
            "celda_key_codigo": "SUBTEXTO",
            "celda_key_valor": "prueba subtexto 1"
          },
          {
            "celda_key_codigo": "TEXTO",
            "celda_key_valor": "Prueba dominio 1"
          }
        ]
      },
      {
        "celda_id": 4,
        "celda_indicador_codigo": "I002",
        "celda_indicador_tipo": "T03",
        "valores_celda": [
          {
            "celda_key_codigo": "CODIGO",
            "celda_key_valor": "codigo"
          }
        ]
      },
      {
        "celda_id": 5,
        "celda_indicador_codigo": "I002",
        "celda_indicador_tipo": "T03",
        "valores_celda": [
          {
            "celda_key_codigo": "CODIGO",
            "celda_key_valor": "ssddsds"
          }
        ]
      },
      {
        "celda_id": 3,
        "celda_indicador_codigo": "I003",
        "celda_indicador_tipo": "T02",
        "valores_celda": [
          {
            "celda_key_codigo": "CODIGO",
            "celda_key_valor": "sdadsa"
          },
          {
            "celda_key_codigo": "IMAGEN",
            "celda_key_valor": "L76nD.jpg"
          },
          {
            "celda_key_codigo": "TEXTO",
            "celda_key_valor": "Texto 1"
          }
        ]
      }
    ],
    "status": 1
  }
}

I know that the error is in my class structure but I can't think of how to assemble them to get the format I want to get.

WHAT I EXPECT

Get an array of cells and their values ​​ordered byIndicadorCodigo

Expected json :

{
  "GetCheckInResult": {
    "celdas": [
         "T01" : [
            {
              "celda_key_codigo": "CODIGO",
              "celda_key_valor": "CHECK1"
            },
            {
              "celda_key_codigo": "IMAGEN",
              "celda_key_valor": "L76nD.jpg"
            },
            {
              "celda_key_codigo": "SUBTEXTO",
              "celda_key_valor": "prueba subtexto 1"
            },
            {
              "celda_key_codigo": "TEXTO",
              "celda_key_valor": "Prueba dominio 1"
            }
        ],
        "T02" : [
            {
              "celda_key_codigo": "CODIGO",
              "celda_key_valor": "CHECK1"
            },
            {
              "celda_key_codigo": "IMAGEN",
              "celda_key_valor": "L76nD.jpg"
            },
            {
              "celda_key_codigo": "SUBTEXTO",
              "celda_key_valor": "prueba subtexto 1"
            },
            {
              "celda_key_codigo": "TEXTO",
              "celda_key_valor": "Prueba dominio 1"
            }
        ]
    ],
    "status": 1
  }
}