Input string was not in a correct format: C#

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C#

MVC

Xamarin

{
  "endpoint": "live", 
  "quotes": [
    {
      "ask": 1.21153, 
      "base_currency": "EUR", 
      "bid": 1.21153, 
      "mid": 1.21153, 
      "quote_currency": "USD"
    }, 
    {
      "ask": 1.39483, 
      "base_currency": "GBP", 
      "bid": 1.39481, 
      "mid": 1.39482, 
      "quote_currency": "USD"
    }
  ], 
  "requested_time": "Thu, 29 Apr 2021 16:19:11 GMT", 
  "timestamp": 1619713151
}

this is my Result i want to get the output from API and deserialized it i tried it but got the

Input string was not in a correct format: c#

Error can you help me on that

What I have tried:

 private async void getCurrentPrize()
        {
            HttpClient client = new HttpClient();
            //HttpResponseMessage response = await client.GetAsync("https://financialmodelingprep.com/api/v3/fx/EURUSD,USDINR,USDCAD,XAUUSD,XAGUSD,GBPUSD,EURJPY,AUDUSD?apikey=xxxxxxxxxxxxxxxxxxxx");
            HttpResponseMessage response = await client.GetAsync("https://marketdata.tradermade.com/api/v1/live?currency=EURUSD,GBPUSD&api_key=_xxxxxxxxxxxxx");
            response.EnsureSuccessStatusCode();
            var responseBody = await response.Content.ReadAsStringAsync();

            var result = JsonConvert.DeserializeObject<CurrencyDetails>(responseBody);
            CurrencyDetails deserialized = new CurrencyDetails();
            foreach (var item in result.quotes)
{
   //my logic here
}

public class CurrencyDetails
   {


       public string endpoint { get; set; }

       public List<quotes> quotes { get; set; }

       public string requested_time { get; set; }

       public long timestamp { get; set; }

   }

public class quotes
   {
       public double ask { get; set; }
       public double bid { get; set; }
       public string base_currency { get; set; }
       public double mid { get; set; }
       public string quote_currency { get; set; }
   }

this is my code can you help me on this