News

Microsoft Unveils .NET Aspire 9.1 with Cloud-Native Enhancements

• By David Ramel
• February 26, 2025

Microsoft has released .NET Aspire 9.1 alongside .NET 10 Preview 1, delivering the latest update to its opinionated, cloud-ready framework designed for building resilient, observable, and configurable cloud-native applications with .NET.

The company has placed a strong emphasis on .NET Aspire as a core part of its developer tooling, with version 9.1 officially launching on February 25, alongside the first preview of .NET 10.

"We are excited to announce the release of .NET Aspire 9.1!" said senior product manager Maddy Montaquila, in a blog post. "This release includes several new features and quality of life improvements based on feedback from developers using .NET Aspire in production applications."

The release introduces several enhancements aimed at improving developer experience and application management. Notable updates include an improved onboarding experience with support for GitHub Codespaces and Dev Containers, allowing for seamless setup and development in cloud-based environments. The dashboard now features resource relationships, visually nesting related resources to clarify dependencies. Localization overrides enable users to set the dashboard language independently of browser settings, and advanced filtering options allow sorting resources by type, state, and health status. Expanded resource details provide deeper insights into configurations, including references and volume mount types. Additionally, developers can configure CORS for custom local domains, enhancing telemetry integration, and console logs now offer download options and ANSI color toggling for improved readability.

These updates collectively enhance monitoring, debugging, and resource visualization in cloud-native .NET applications.

Some key updates include:

Improved Onboarding Experience
GitHub Codespaces and Dev Containers Support: .NET Aspire 9.1 introduces templates compatible with GitHub Codespaces and Visual Studio Code Dev Containers, enabling seamless cloud-based development environments.

Dashboard Enhancements
Resource Relationships: The dashboard now visually represents parent-child relationships among resources, such as a PostgreSQL instance with multiple databases, enhancing clarity in resource management.

Localization Overrides: Users can set the dashboard language independently of their browser settings, providing a more personalized experience.

Advanced Filtering: New filters allow sorting resources by type, state, and health status, streamlining navigation and monitoring.

Expanded Resource Details: The details pane now displays additional information, including references, back references, and volume mount types, offering deeper insights into resource configurations.

Clear Logs and Telemetry: New options allow users to clear console logs, structured logs, traces, and metrics directly from the dashboard, facilitating a cleaner workspace during development and testing.

Additional Features
CORS Support for Custom Local Domains: Developers can configure Cross-Origin Resource Sharing (CORS) to permit the dashboard to receive telemetry from browser applications on custom local domains, facilitating integrated monitoring.

Flexible Console Logs: The console log page now includes options to download logs for external analysis and to toggle ANSI color codes, improving readability and diagnostics.

Improved Docker Integration: Enhancements in Docker support simplify co