Feat/source code enhancements

[Patrick8639]

Source-code enhancements:

• new C# syntax;
• static lambda;
• remove not used local variables;
• remove implicit calls to base class;
• use base class for static method, when needed.

This is a first batch of corrections, more to come (still 2159 warnings...)

[yufeih]

@Patrick8639 build failed.

[Patrick8639]

Hello @yufeih and @filzrev , Thank you for your comments.

I will rebase to main and start again, taking into account the remarks.

What do you think would be the better to push the changes?

• One commit / pull request per file.
• One commit / pull request per type of change.

Consider disable adding spaces to align property names. The rest of the codebase does not follow this style pattern.

Yes, I will take attention to this, even if I think that the code is more readable when the = are aligned...