web request and json in c #

I'm working with firebase, and am fetching the data from the server with HttpWebRequest, I was able to recover this data as follows;

  

{"- L1OD7LjENM8ZHSpS7NE": {"Age": "18   years "," Name ":" vitor "," Telephone ":" 11   970705570 "}," - L1ODHPKmz_1zcCfpZwF ": {" Age ":" 10 years "," Name ":" joao   "," Phone ":" 9898294792 "}," - L1ODMFC92yisdG4UxPU ": {" Age ":" 30   years "," Name ":" bruno "," Phone ":" 9898294792 "}}

Using this code below;

HttpWebRequest pesquisar = (HttpWebRequest)WebRequest.CreateHttp(URL);
pesquisar.ContentType = "application/json: charset=utf-8";
HttpWebResponse pesquisar1 = pesquisar.GetResponse() as HttpWebResponse;
using (Stream pesquisarStream = pesquisar1.GetResponseStream())
{
    StreamReader reader = new StreamReader(pesquisarStream, Encoding.UTF8);

            var text = reader.ReadToEnd();

            richTextBox1.Text = text;
}

I would like to receive this data, directly in a json file and create a list to manipulate both the data and the keys.

If anyone can help, thank you.