How can I write function to show me information(espacially date for rates)

{
    "Meta Data": {
        "1. Information": "Daily Prices (open, high, low, close) and volumes",
        "2. Symbol": "",
        "3. Last Refreshed": "2015-05-20",
        "4. Output Size": "Compact",
        "5. Time Zone": "US/Eastern"
    },
    "Time Series (Daily)": {
        "2015-05-20": {
            "1. open": "108",
            "2. high": "108",
            "3. low": "106.",
            "4. close": "106",
            "5. volume": "56038827"
        },
        "2015-05-19": {
            "1. open": "104",
            "2. high": "105",
            "3. low": "103",
            "4. close": "104",
            "5. v

public class MetaData
{
    public string __invalid_name__1. Information { get; set; }
    public string __invalid_name__2. Symbol { get; set; }
    public string __invalid_name__3. Last Refreshed { get; set; }
    public string __invalid_name__4. Output Size { get; set; }
    public string __invalid_name__5. Time Zone { get; set; }
}

public class __invalid_type__20180720
{
    public string __invalid_name__1. open { get; set; }
    public string __invalid_name__2. high { get; set; }
    public string __invalid_name__3. low { get; set; }
    public string __invalid_name__4. close { get; set; }
    public string __invalid_name__5. volume { get; set; }
}

public class __invalid_type__20180719
{
    public string __invalid_name__1. open { get; set; }
    public string __invalid_name__2. high { get; set; }
    public string __invalid_name__3. low { get; set; }
    public string __invalid_name__4. close { get; set; }
    public string __invalid_name__5. volume { get; set; }
}