The variable 'tid2' is assigned but its value is never used

This async method lacks 'await' operators and will run synchronously. Consider using the 'await' operator to await non-blocking API calls, or 'await Task.Run(...)' to do CPU-bound work on a background thread.

Found version-specific or distribution-specific runtime identifier(s): centos7-x64. Affected libraries: Microsoft.CognitiveServices.Speech. In .NET 8.0 and higher, assets for version-specific and distribution-specific runtime identifiers will not be found by default. See https://aka.ms/dotnet/rid-usage for details.

'WebClient.WebClient()' is obsolete: 'WebRequest, HttpWebRequest, ServicePoint, and WebClient are obsolete. Use HttpClient instead.' (https://aka.ms/dotnet-warnings/SYSLIB0014)

The type name 'videophrase' only contains lower-cased ascii characters. Such names may become reserved for the language.

The type name 'videophrase' only contains lower-cased ascii characters. Such names may become reserved for the language.

The type name 'two' only contains lower-cased ascii characters. Such names may become reserved for the language.

The type name 'two' only contains lower-cased ascii characters. Such names may become reserved for the language.

The annotation for nullable reference types should only be used in code within a '#nullable' annotations context.