c# parsing time series data

I am getting a JSON response from an external API and I am having a bit of a problem trying to deserialize. Here is the JSON:

{
"Time Series (Daily)": {
    "2017-06-01": {
        "1. open": "70.2400",
        "2. high": "70.6100",
        "3. low": "69.4510",
        "4. close": "70.1000",
        "5. volume": "21066468"
    },
    "2017-05-31": {
        "1. open": "70.5300",
        "2. high": "70.7400",
        "3. low": "69.8100",
        "4. close": "69.8400",
        "5. volume": "30436364"
    }
}
}

Here are the classes that I tried to deserialize into:

public class StockQuote
{ 
    [JsonProperty("Time Series (Daily)")]
    public TimeSeriesDaily Daily { get; set; } 

}

public class TimeSeriesDaily
{
   public string Date { get; set; }
   public TimeSeries[] Daily { get; set; }
}

public class TimeSeries
{
    [JsonProperty("1. open")]
    public string Open { get; set; }
    [JsonProperty("2. high")]
    public string High { get; set; }
    [JsonProperty("3. low")]
    public string Low { get; set; }
    [JsonProperty("4. close")]
    public string Close { get; set; }
    [JsonProperty("5. volume")]
    public string Volume { get; set; }
}

This deserializes as null. I think that the class TimeSeries is correct, but I am not sure how to handle the changing date. Using json2csharp does not create valid classes for me, it tells me the JSON is invalid.

Thanks for your help.