Using directive should appear within a namespace declaration (https://github.com/DotNetAnalyzers/StyleCopAnalyzers/blob/master/documentation/SA1200.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)

Parameter args of method Main is never used. Remove the parameter or use it in the method body. (https://docs.microsoft.com/visualstudio/code-quality/ca1801-review-unused-parameters)

Method 'void Program.Main(string[] args)' passes a literal string as parameter 'value' of a call to 'void Console.WriteLine(string? value)'. Retrieve the following string(s) from a resource table instead: "Hello World!". (https://docs.microsoft.com/visualstudio/code-quality/ca1303-do-not-pass-literals-as-localized-parameters)

Parameter args of method Main is never used. Remove the parameter or use it in the method body. (https://docs.microsoft.com/visualstudio/code-quality/ca1801-review-unused-parameters)

Method 'void Program.Main(string[] args)' passes a literal string as parameter 'value' of a call to 'void Console.WriteLine(string? value)'. Retrieve the following string(s) from a resource table instead: "Hello World!". (https://docs.microsoft.com/visualstudio/code-quality/ca1303-do-not-pass-literals-as-localized-parameters)

Targeting .NET Standard prior to 2.0 is no longer recommended. See https://aka.ms/dotnet/dotnet-standard-guidance for more details.

Targeting .NET Standard prior to 2.0 is no longer recommended. See https://aka.ms/dotnet/dotnet-standard-guidance for more details.

Targeting .NET Standard prior to 2.0 is no longer recommended. See https://aka.ms/dotnet/dotnet-standard-guidance for more details.

Targeting .NET Standard prior to 2.0 is no longer recommended. See https://aka.ms/dotnet/dotnet-standard-guidance for more details.