Version 1.0, effective as of 5 February 2026

1. Overview

This Schedule sets out the baseline support terms for Avalonia XPF and Avalonia Accelerate where support is included as part of a product licence or Order Form.

Enhanced Support for Avalonia (open-source) is governed separately by Schedule 3A (Enhanced Support - Business) and Schedule 3B (Enhanced Support - Enterprise).

2. Definitions

"Error" means an error, flaw, mistake, failure, or fault in the Supported Software that prevents it from behaving as described in the applicable documentation.

"Response Time" means the period from when a support request is submitted until Avalonia UI provides a response that addresses (but does not necessarily resolve) the reported issue.

"Security Issue" means an Error that causes or reasonably could cause a vulnerability in a system or application using the Supported Software where such vulnerability can or reasonably could impact privacy or security.

"Supported Software" means the specific Avalonia UI product(s) identified in the applicable Order Form or Product Schedule for which the Customer has purchased support.

"Support Portal" means Avalonia's web-based support interface for ticket submission and support-related services.

3. General Support Terms

3.1 Services Provided

Subject to the applicable Product Schedule or Order Form, Avalonia UI will provide support via the channels specified therein (e.g., Customer Portal, email, or community forum).

Support is provided exclusively for projects written in C#. Avalonia UI does not offer support for applications built with F# or VB.NET.

Support is available only to individuals entitled to support under the applicable Product Schedule or Order Form (for example, Named Users or Developer Seats).

3.2 Scope of Support

Avalonia UI will make commercially reasonable efforts to resolve Errors in the Supported Software reported by entitled users. Resolution may be provided through a later released version, a fix, a workaround, or other solution Avalonia UI deems reasonable.

Support is limited to issues specifically related to the functionality, integration, and behaviour of the Supported Software. Issues originating from third-party components, platforms, or frameworks outside Avalonia UI's control may receive guidance or workarounds at Avalonia UI's discretion, but Avalonia UI is not obligated to provide fixes for external components.

Support is limited to the Supported Software. Avalonia UI does not provide general .NET support, general Avalonia framework development support, or advice on issues outside the scope of the Supported Software. For the avoidance of doubt, support under this Schedule does not extend to the open-source Avalonia framework, which is available separately under Schedule 3A (Enhanced Support - Business) or Schedule 3B (Enhanced Support - Enterprise). Support for one Avalonia UI product does not entitle the Customer to support for any other product; requests outside scope will be declined.

3.3 Service Availability

Avalonia UI delivers support through third-party platforms and infrastructure, including hosted support portals, email services, and communication tools. Any Response Time commitments set out in this Schedule or in the applicable Product Schedule or Order Form are suspended during periods when support channels are unavailable due to outages or disruptions affecting third-party service providers beyond Avalonia UI's reasonable control. Avalonia UI will use commercially reasonable efforts to restore support services promptly and to provide alternative channels where practicable.

3.5 Support Limitations

Support will be aligned with the major version available at the time of purchase. If a new major version is released during the Support Period, the Customer may seek support for both versions. Upon renewal, support is limited to the latest major version unless otherwise specified in the applicable Product Schedule or Order Form.

Support is not provided for: Pre-Release Functionality; forks of Avalonia UI; Errors on unsupported platforms; hardware or OS-specific problems; or problems arising from improper use, accident, neglect, or modification.

3.6 Support Request Requirements

All support requests relating to issues must provide detailed information to allow Avalonia UI to quickly and easily verify the problem. Each support request must include:

A clear, detailed description of the problem;
Identification of the affected Avalonia UI package and version;
Operating environment information (OS, runtime, hardware platform);
A minimal, compilable test case (preferably under 500 lines);
Relevant screenshots or diagnostic content in standard formats (JPEG, PNG);
Attachments in .zip or .tar.gz format (executables and proprietary formats not accepted).

Where the Support Portal is used, the support request must be submitted using the entitled user's Avalonia Account.

Failure to provide adequate information may relieve Avalonia UI from performing Support Services.

4. Security Issues

4.1 Reporting

Security Issues must be marked as such in the applicable support channel to ensure proper prioritisation.

4.2 Response Time

Security Issue Response Times, if any, are set out in the applicable Product Schedule or Order Form.

4.3 Security Fix Delivery

Verified Security Issues will be fixed as soon as practically possible, dependent on severity. Patches for currently supported versions will be provided along with appropriate notifications.

4.4 Third-Party Security Issues

If a Security Issue is in a third-party library used in Avalonia UI, Avalonia UI will notify the relevant third party. When fixed, the new version will be included in a Maintenance Release. If no fix is available, Avalonia UI may provide documentation or a patch for the third-party library.

End of Schedule 3

Schedule 3: Product Support