'MyOption.UseShakaPackager' is obsolete: 'Use DecryptionEngine instead'

'ServicePointManager' is obsolete: 'WebRequest, HttpWebRequest, ServicePoint, and WebClient are obsolete.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)

'MyOption.UseShakaPackager' is obsolete: 'Use DecryptionEngine instead'

The variable 'e' is declared but never used

'MyOption.UseShakaPackager' is obsolete: 'Use DecryptionEngine instead'

'ServicePointManager' is obsolete: 'WebRequest, HttpWebRequest, ServicePoint, and WebClient are obsolete.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)

'MyOption.UseShakaPackager' is obsolete: 'Use DecryptionEngine instead'

The variable 'e' is declared but never used

The variable 'sawMDAT' is assigned but its value is never used

Possible null reference argument for parameter 'hex' in 'byte[] HexUtil.HexToBytes(string hex)'.

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