'Message' does not contain a definition for 'IsFromSystem' and no accessible extension method 'IsFromSystem' accepting a first argument of type 'Message' could be found (are you missing a using directive or an assembly reference?)

'Command' does not contain a definition for 'Welcome'

'Message' does not contain a definition for 'IsFromSystem' and no accessible extension method 'IsFromSystem' accepting a first argument of type 'Message' could be found (are you missing a using directive or an assembly reference?)

'Command' does not contain a definition for 'Join'

'Message' does not contain a definition for 'IsAboutUser' and no accessible extension method 'IsAboutUser' accepting a first argument of type 'Message' could be found (are you missing a using directive or an assembly reference?)

'Command' does not contain a definition for 'Join'

'Message' does not contain a definition for 'IsFromSystem' and no accessible extension method 'IsFromSystem' accepting a first argument of type 'Message' could be found (are you missing a using directive or an assembly reference?)

'Command' does not contain a definition for 'YourHost'

The name 'ExpectedHost' does not exist in the current context

The name 'ExpectedHost' does not exist in the current context

'SslProtocols.Tls' is obsolete: 'TLS versions 1.0 and 1.1 have known vulnerabilities and are not recommended. Use a newer TLS version instead, or use SslProtocols.None to defer to OS defaults.' (https://aka.ms/dotnet-warnings/SYSLIB0039)

'SslProtocols.Tls11' is obsolete: 'TLS versions 1.0 and 1.1 have known vulnerabilities and are not recommended. Use a newer TLS version instead, or use SslProtocols.None to defer to OS defaults.' (https://aka.ms/dotnet-warnings/SYSLIB0039)

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.

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.

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.

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.

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.

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.

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.