Modernize and refactor: C# codebase to leverage latest C# features

[Ambaaq-Ajibike]

No description provided.

[Copilot]

Pull Request Overview

This PR modernizes the C# codebase by leveraging newer C# language features to improve code conciseness and readability. The changes focus on using collection expressions and modern syntax patterns available in recent C# versions.

• Replaced traditional new List<T>() and new Dictionary<T, K>() instantiations with collection expressions []
• Utilized spread operators .. for more concise list concatenation in tree traversal methods
• Applied dictionary indexer initialization syntax for cleaner dictionary assignments
• Simplified control flow in some methods by removing unnecessary else blocks

Reviewed Changes

Copilot reviewed 8 out of 8 changed files in this pull request and generated 4 comments.

Show a summary per file

File	Description
DataStructures/Heap/PairingHeap/PairingHeap.cs	Modernized list initialization using collection expressions
DataStructures/BinarySearchTree/BinarySearchTree.cs	Refactored tree traversal methods to use spread operators for list concatenation
Algorithms/Strings/Permutation.cs	Updated HashSet initialization to use collection expressions
Algorithms/Sorters/Comparison/TimSorter.cs	Simplified ternary operator formatting
Algorithms/Problems/TravelingSalesman/TravelingSalesmanSolver.cs	Modernized list initialization and improved control flow with yield break
Algorithms/Problems/DynamicProgramming/CoinChange/DynamicCoinChangeSolver.cs	Updated list and dictionary initialization to use collection expressions
Algorithms/Other/FloodFill.cs	Simplified list initialization formatting
Algorithms/DataCompression/HuffmanCompressor.cs	Applied dictionary indexer syntax and collection expressions

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[siriak]

Please check why build fails

[Ambaaq-Ajibike]

The corrections are done, and the code is building successfully now.

…

On Tue, 14 Oct 2025 at 09:15, Andrii Siriak ***@***.***> wrote: *siriak* left a comment (TheAlgorithms/C-Sharp#545) <#545 (comment)> Please check why build fails image.png (view on web) <https://github.com/user-attachments/assets/9e84bc41-be4b-478f-bf45-79d205c366f3> — Reply to this email directly, view it on GitHub <#545 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AXLTWJBDBA54ZEUYLJTHY433XSWLZAVCNFSM6AAAAACJAVS33WVHI2DSMVQWIX3LMV43OSLTON2WKQ3PNVWWK3TUHMZTIMBQGYZTKOJXGU> . You are receiving this because you authored the thread.Message ID: ***@***.***>

[Copilot]

Pull Request Overview

Copilot reviewed 5 out of 5 changed files in this pull request and generated 1 comment.

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 96.67%. Comparing base (c6c3aa2) to head (534dbd3).
⚠️ Report is 1 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #545      +/-   ##
==========================================
- Coverage   96.68%   96.67%   -0.01%     
==========================================
  Files         280      280              
  Lines       11059    11057       -2     
  Branches     1577     1577              
==========================================
- Hits        10692    10689       -3     
  Misses        232      232              
- Partials      135      136       +1     

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[siriak]

Looks good, thanks!