'Exception.Exception(SerializationInfo, StreamingContext)' is obsolete: 'This API supports obsolete formatter-based serialization. It should not be called or extended by application code.' (https://aka.ms/dotnet-warnings/SYSLIB0051)

Converting null literal or possible null value to non-nullable type.

Possible null reference return.

'NpgsqlConnection.GlobalTypeMapper' is obsolete: 'Global-level type mapping has been replaced with data source mapping, see the 7.0 release notes.'

The file header is missing or not located at the top of the file. (https://github.com/DotNetAnalyzers/StyleCopAnalyzers/blob/master/documentation/SA1633.md)

File is required to end with a single newline character (https://github.com/DotNetAnalyzers/StyleCopAnalyzers/blob/master/documentation/SA1518.md)

The file header is missing or not located at the top of the file. (https://github.com/DotNetAnalyzers/StyleCopAnalyzers/blob/master/documentation/SA1633.md)

Code should not contain trailing whitespace (https://github.com/DotNetAnalyzers/StyleCopAnalyzers/blob/master/documentation/SA1028.md)

The file header is missing or not located at the top of the file. (https://github.com/DotNetAnalyzers/StyleCopAnalyzers/blob/master/documentation/SA1633.md)