Daily, developers face the task of refactoring code to enhance readability and adhere to best practices. Claude Code, integrated via the MCP, offers a powerful way to automate this. Instead of manually searching and replacing or rewriting blocks of code, you can prompt Claude Code with specific refactoring instructions. For instance, to make a verbose method more concise, you might use a prompt like: “Refactor this C# method to use LINQ for improved readability and efficiency.”
Let’s say you have a C# method like this:
public List<string> GetActiveUsernames(List<User> users)
{
List<string> activeUsernames = new List<string>();
foreach (var user in users)
{
if (user.IsActive)
{
activeUsernames.Add(user.Username);
}
}
return activeUsernames;
}
Using Claude Code MCP, you can get a refactored version that leverages LINQ:
public List<string> GetActiveUsernames(List<User> users)
{
return users.Where(u => u.IsActive).Select(u => u.Username).ToList();
}
This transformation not only shortens the code but also expresses the intent more declaratively. The MCP CLI can be used to interact with Claude Code directly from your terminal, allowing you to paste your code, provide the refactoring prompt, and receive the updated code in your workflow without context switching.
To facilitate this, ensure your MCP CLI is configured. A typical command might look like mcp code refactor --prompt "Simplify this C# method using pattern matching." --file path/to/your/file.cs. This allows for rapid iteration and experimentation with different refactoring strategies, ultimately leading to cleaner and more maintainable .NET codebases.