Comprehensive Documentation for LINQPad 9 AI Features: Enhancing .NET Coding Workflows

If you’re a .NET developer searching for detailed LINQPad AI documentation, you’ve come to the right place. LINQPad 9 introduces powerful AI features designed to streamline coding tasks, from code completion to interactive chat-based assistance. These enhancements build on LINQPad’s core strengths as a rapid application development (RAD) tool for building personal software, solving business problems, querying databases, testing code snippets, and exploring .NET APIs. In this guide, we’ll cover the key capabilities of LINQPad 9 AI features, including setup, supported providers, prompting options, and privacy considerations. Whether you’re on Windows or macOS, these tools are available exclusively in LINQPad Premium editions, making it easier to integrate large language models (LLMs) into your daily workflow.

Getting Started with LINQPad 9 AI Features

To access LINQPad’s AI features, ensure you have LINQPad Premium installed on your Windows or macOS system. The AI integration requires an API key from your chosen provider, but no additional subscriptions beyond your LINQPad license are needed for basic functionality. Start by navigating to the AI Completion & Chat settings in the menu. Here, you can enable automatic code completion and chat assistance, configure keyboard shortcuts like Ctrl+Space for completions or Ctrl+I (Command+I on macOS) for inline AI prompts, and set up providers.

LINQPad 9’s AI features support a wide range of models through various providers, allowing you to choose the best fit for code generation, refactoring, or debugging. For instance, you can configure separate models for code completions versus chat interactions, optimizing performance for specific tasks.

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Supported AI Providers and Model Configuration in LINQPad 9

One of the standout aspects of the LINQPad 9 AI functionality is its flexibility with AI providers. LINQPad integrates natively with several options, ensuring compatibility with major LLMs:

OpenRouter: Access to the latest premium models WITHOUT ID verification.
OpenAI: Use your OpenAI API key.
Anthropic: Connect directly to your Anthropic account for models such as Claude 4.5 Sonnet.
Azure OpenAI: Integrate with an Azure OpenAI resource for enterprise-grade deployments.
Custom OpenAI-Compatible Endpoints: Connect to any compatible endpoint for tailored setups.
Custom Anthropic-Compatible Endpoints: Similar flexibility for Anthropic-based services.
Ollama: Ideal for local, offline model usage.

A dedicated configuration dialog lets you add, remove, or switch providers effortlessly. For premium models, ID verification may be required by the provider itself—not by LINQPad—to comply with their policies. This setup ensures LINQPad’s AI features can leverage high-end reasoning models like Sonnet 4.5 without waiting for updates in other tools.

When configuring, you can set system defaults for completions (automatic or manual) and chats, including options like temperature for reasoning parameters. This modularity makes LINQPad 9 a versatile platform for .NET developers exploring LINQPad agentic coding capabilities.

Predefined and Customizable Prompts for Agentic Coding in LINQPad

LINQPad 9 excels in agentic coding through its prompting system, which allows AI to act more intelligently on your code. Predefined prompts cover common scenarios, such as:

Opening a conversation or general chat about the current script.
Cleaning up code, explaining errors, or fixing bugs.
Checking if code is thread-safe or well-written.
Modifying code to use different libraries or optimizing it.
Translating code to other languages like C#.
Utilizing LINQPad-specific features, like writing scripts or XUnit tests.

You can customize these prompts or create new ones, incorporating agentic behaviors where the AI queries database schemas (if enabled), fetches relevant LINQPad samples and APIs, and uses LINQPad’s compiler to validate and fix errors before suggesting changes. A customizable system prompt further tailors the AI’s responses to your preferences.

For quick access, press Ctrl+I (for both macOS and Windows) to select a prompt directly in the editor. This agentic approach in LINQPad’s AI features reduces manual debugging, making it a go-to tool for efficient .NET development.

Inline and Embedded AI Chat Experience

The inline AI chat in LINQPad 9 embeds assistance right within your editor, displaying proposed code changes as red/green diffs. This allows you to review, accept, or reject modifications with a single click—perfect for refactoring without disrupting your flow.

Key benefits include:

Seamless code updates based on your queries.
Ability to choose models and adjust parameters on the fly.
“Get Second Opinion” feature to compare responses from different models.

This embedded experience is ideal for tasks like explaining code errors or optimizing LINQ queries, all while keeping sensitive data secure.

Dedicated AI Chat Panel for Deeper Interactions

For more extensive discussions, LINQPad 9 offers a separate AI chat panel. This dedicated space supports ongoing conversations, where you can ask questions about your script, request API explanations, or explore .NET concepts. Like the inline chat, it integrates with your code context but provides a broader canvas for complex interactions.

Both chat modes in LINQPad 9 AI features enhance productivity by allowing agentic prompting, where the AI proactively gathers context like NuGet packages and namespaces to deliver accurate suggestions.

AI Autocompletion Enhancements in LINQPad 9

LINQPad 9’s autocompletion has been upgraded with a new code context extractor, improved prompts, and better output cleansing. It now interacts with member completion lists and offers an optional automatic mode that triggers suggestions as you type.

Configure it via the settings menu to ask for confirmation before sending data or to use Shift+Space for manual activation. This feature is particularly useful for .NET coding tasks, such as writing LINQ expressions or integrating third-party libraries.

Privacy and Data Handling in LINQPad’s AI Features

Privacy is a core focus in when using AI in LINQPad. When requesting AI assistance, only non-sensitive data is sent, including:

The current script.
A list of NuGet package references and namespace imports.
Autocompletion listings.
Database schemas (if enabled).
Questions explicitly asked by the user.

Excluded items ensure security:

Database connection string details (entered via the Connection Properties dialog).
Passwords or API keys stored via Util.GetPassword.
Results from executing a script (including database content).

To further protect secrets, avoid storing them in source code—use LINQPad’s Util.GetPassword or a key management system like Azure Key Vault.

Conclusion: Why LINQPad 9 AI Features Are Essential for .NET Developers

LINQPad 9’s AI features transform how .NET developers approach coding, offering agentic capabilities that query schemas, validate code, and provide context-aware assistance across Windows and macOS. By supporting a broad array of providers and customizable prompts, LINQPad positions itself as a comprehensive tool for modern development workflows.

For more on LINQPad agentic coding or to dive deeper into specific features, explore the official LINQPad resources or experiment in your Premium edition. Stay tuned to learninglinqpad.com for updates on LINQPad tutorials, tips, and .NET best practices. If you’re optimizing your setup for SEO-friendly .NET projects, these AI tools can accelerate your progress significantly.

Want to practice these concepts hands-on? Try LINQPad—it’s the fastest way to experiment with code, test database queries, and build your confidence for interviews. For more in-depth learning, check out our LINQPad Fundamentals course.