The type name JsonColumnizer conflicts in whole or in part with the namespace name 'JsonColumnizer'. Change either name to eliminate the conflict. (https://learn.microsoft.com/dotnet/fundamentals/code-analysis/quality-rules/ca1724)

In externally visible method 'IColumnizedLogLine JsonColumnizer.SplitJsonLine(ILogLine line, JObject json)', validate parameter 'json' is non-null before using it. If appropriate, throw an 'ArgumentNullException' when the argument is 'null'. (https://learn.microsoft.com/dotnet/fundamentals/code-analysis/quality-rules/ca1062)

In externally visible method 'JObject JsonColumnizer.ParseJson(ILogLine line)', validate parameter 'line' is non-null before using it. If appropriate, throw an 'ArgumentNullException' when the argument is 'null'. (https://learn.microsoft.com/dotnet/fundamentals/code-analysis/quality-rules/ca1062)

In externally visible method 'Priority JsonColumnizer.GetPriority(string fileName, IEnumerable<ILogLine> samples)', validate parameter 'fileName' is non-null before using it. If appropriate, throw an 'ArgumentNullException' when the argument is 'null'. (https://learn.microsoft.com/dotnet/fundamentals/code-analysis/quality-rules/ca1062)

In externally visible method 'void JsonColumnizer.Selected(ILogLineColumnizerCallback callback)', validate parameter 'callback' is non-null before using it. If appropriate, throw an 'ArgumentNullException' when the argument is 'null'. (https://learn.microsoft.com/dotnet/fundamentals/code-analysis/quality-rules/ca1062)

In externally visible method 'IColumnizedLogLine JsonColumnizer.SplitLine(ILogLineColumnizerCallback callback, ILogLine line)', validate parameter 'line' is non-null before using it. If appropriate, throw an 'ArgumentNullException' when the argument is 'null'. (https://learn.microsoft.com/dotnet/fundamentals/code-analysis/quality-rules/ca1062)

Do not nest type ColumnWithName. Alternatively, change its accessibility so that it is not externally visible. (https://learn.microsoft.com/dotnet/fundamentals/code-analysis/quality-rules/ca1034)

Change the type of parameter 'uriString' of method 'IFileSystemPlugin.CanHandleUri(string)' from 'string' to 'System.Uri', or provide an overload to 'IFileSystemPlugin.CanHandleUri(string)' that allows 'uriString' to be passed as a 'System.Uri' object (https://learn.microsoft.com/dotnet/fundamentals/code-analysis/quality-rules/ca1054)

Change the type of parameter 'uriString' of method 'IFileSystemPlugin.GetLogfileInfo(string)' from 'string' to 'System.Uri', or provide an overload to 'IFileSystemPlugin.GetLogfileInfo(string)' that allows 'uriString' to be passed as a 'System.Uri' object (https://learn.microsoft.com/dotnet/fundamentals/code-analysis/quality-rules/ca1054)

Nullability of type of parameter 'obj' doesn't match overridden member (possibly because of nullability attributes).

'success == false' is always 'false'. Remove or refactor the condition(s) to avoid dead code. (https://learn.microsoft.com/dotnet/fundamentals/code-analysis/quality-rules/ca1508)

'_sftp != null' is always 'true'. Remove or refactor the condition(s) to avoid dead code. (https://learn.microsoft.com/dotnet/fundamentals/code-analysis/quality-rules/ca1508)

'privateKeyFile != null' is always 'true'. Remove or refactor the condition(s) to avoid dead code. (https://learn.microsoft.com/dotnet/fundamentals/code-analysis/quality-rules/ca1508)

This overload of the 'XmlSerializer.Deserialize' method is potentially unsafe. It may enable Document Type Definition (DTD) which can be vulnerable to denial of service attacks, or might use an XmlResolver which can be vulnerable to information disclosure. Use an overload that takes a XmlReader instance instead, with DTD processing disabled and no XmlResolver. (https://learn.microsoft.com/dotnet/fundamentals/code-analysis/quality-rules/ca5369)

Modify 'CanHandleUri' to catch a more specific allowed exception type, or rethrow the exception (https://learn.microsoft.com/dotnet/fundamentals/code-analysis/quality-rules/ca1031)

Modify 'GetLogfileInfo' to catch a more specific allowed exception type, or rethrow the exception (https://learn.microsoft.com/dotnet/fundamentals/code-analysis/quality-rules/ca1031)

Modify 'get_FileExists' to catch a more specific allowed exception type, or rethrow the exception (https://learn.microsoft.com/dotnet/fundamentals/code-analysis/quality-rules/ca1031)

Change the type of parameter 'uriString' of method 'IFileSystemPlugin.CanHandleUri(string)' from 'string' to 'System.Uri', or provide an overload to 'IFileSystemPlugin.CanHandleUri(string)' that allows 'uriString' to be passed as a 'System.Uri' object (https://learn.microsoft.com/dotnet/fundamentals/code-analysis/quality-rules/ca1054)

Change the type of parameter 'uriString' of method 'IFileSystemPlugin.GetLogfileInfo(string)' from 'string' to 'System.Uri', or provide an overload to 'IFileSystemPlugin.GetLogfileInfo(string)' that allows 'uriString' to be passed as a 'System.Uri' object (https://learn.microsoft.com/dotnet/fundamentals/code-analysis/quality-rules/ca1054)