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+# Copilot Instructions for PathBench
+
+## What's this file for?
+
+- This file provides instructions for generating source or operating as an agent
+  for this repository to GitHub Copilot or other AI code assistants.
+- When implementing new features, please use the technology selection,
+  design policy, and module configuration shown here as a premise.
+- If in doubt, explore the files in the repository and ask the user "Is this
+  what you meant?"
+
+## Preconditions
+
+- The comments or documentations in the source codes must be in English unless
+  there is specific instructions.
+- The answer in the shell writes in user local language as possible as.
+- When making code changes, if the number of lines modified is likely to exceed
+  200, please prompt the user beforehand with the message: "This instruction may
+  result in over 200 lines of code being modified. Do you wish to proceed?"
+- When making significant changes, first create a plan outlining what you intend
+  to do, then propose it to the user by saying, "We plan to proceed with this
+  approach." If the user requests modifications to the plan at this stage,
+  revise the plan accordingly and resubmit it.
+
+## Project overview
+
+PathBench is a .NET library for benchmarking and analyzing the performance of
+different algorithms and data structures. It provides a way to measure execution
+time, allowing developers to optimize their code effectively.
+
+Please refer to the [README.md](../README.md) for more details about the
+project, including its features, installation instructions, and usage examples.
+
+## Directories and files
+
+This project has the following directory structure:
+
+```
+./
++-- .editorconfig                    # Editor configuration file
++-- .gitignore                       # Git ignore file
++-- Directory.Build.props            # MSBuild shared properties for the project
++-- LICENSE.txt                      # License information for the project
++-- Measure-Coverage.ps1             # PowerShell script for measuring code coverage
++-- PathBench.slnx                   # Visual Studio solution file
++-- README.md                        # Project overview and documentation
++-- global.json                      # .NET SDK version configuration
++-- .github/
+|   +-- workflows/                   # GitHub Actions workflow files
+|   |   +-- dotnet-CI.yml            # CI workflow for .NET builds and tests
+|   +-- copilot-instructions.md      # This file: instructions for GitHub Copilot
++-- resources/                       # Misc. resource files for the project
++-- src/                             # Source code for the library
+|   +-- PathBench/                   # Main library code
++ tests/                             # Unit tests for the library
+    +-- PathBench.Test/              # Unit tests for the library
+    +-- etc/
+        +-- coverlet.runsettings     # Coverlet configuration for code coverage analysis
+```
+
+## Coding style
+
+- Unless specific commented, the coding style should follow .editorconfig file.
+- Unless specific commented, the coding style should follow the [Microsoft C# coding conventions](https://learn.microsoft.com/en-us/dotnet/csharp/fundamentals/coding-style/coding-conventions).
+- All of public members must have XML documentation comments.