'ServicePointManager' is obsolete: 'WebRequest, HttpWebRequest, ServicePoint, and WebClient are obsolete. Use HttpClient instead. Settings on ServicePointManager no longer affect SslStream or HttpClient.' (https://aka.ms/dotnet-warnings/SYSLIB0014)

Possible null reference argument for parameter 'option' in 'Task<DownloadTask> BBDownApiServer.AddDownloadTaskAsync(MyOption option)'.

Possible null reference argument for parameter 'sub' in 'string BBDownUtil.RSubString(string sub)'.

Possible null reference argument for parameter 'sub' in 'string BBDownUtil.RSubString(string sub)'.

Possible null reference argument for parameter 'encoding' in 'Task<ParsedResult> Parser.ExtractTracksAsync(string aidOri, string aid, string cid, string epId, bool tvApi, bool intlApi, bool appApi, string encoding, string qn = "0")'.

Possible null reference argument for parameter 'option' in 'Task<DownloadTask> BBDownApiServer.AddDownloadTaskAsync(MyOption option)'.

'ServicePointManager' is obsolete: 'WebRequest, HttpWebRequest, ServicePoint, and WebClient are obsolete. Use HttpClient instead. Settings on ServicePointManager no longer affect SslStream or HttpClient.' (https://aka.ms/dotnet-warnings/SYSLIB0014)

Dereference of a possibly null reference.

Dereference of a possibly null reference.

Non-nullable property 'WebJsonString' must contain a non-null value when exiting constructor. Consider adding the 'required' modifier or declaring the property as nullable.