.Net Core Agent

2026 Release Notes

Version	Date	Change
3.15.0	February 4, 2026	New Features and Updates: Added agent console messages to improve runtime visibility and diagnostics. Introduced a warning when re-running the scan command with the same buildSessionId. Added support for file-based logging by specifying a log file name. Introduced the prId option for the coverage collector. Added support for using the system proxy configuration for the HTTP client. Added a predefined session file option for the instrumentIIS command. Added automatic CLI documentation generation. Resolved Issues: Fixed class logical path handling in the CD Agent scan command.

2025 Release Notes

Version	Date	Change
3.14.6	December 16, 2025	New Features and Updates: Added beta support for the Dynatrace profiler via multiprofiler on Windows. Added support for passing process filters via CLI arguments to the coverage collector when running in process-wrapper mode. Resolved Issues: Fixed an issue with default branch validation.
3.14.5	December 4, 2025	New Features and Updates: Added beta support for the Dynatrace profiler via multiprofiler on Linux. Made branchName configuration optional for CD Agent. Resolved Issues: Fixed an edge case where footprints were missing on shutdown. Fixed profiler compilation issued in the new .NET SDK Docker files.
3.14.4	November 17, 2025	Resolved Issues: Fixed an issue where ModuleId was missing in the Cockpit.
3.14.3	November 12, 2025	New Features and Updates: Added support for instrumenting IIS or Windows services using PIC mode. Added additional instrumentation tools for debugging low-level profiling issues.
3.14.2	October 27, 2025	Resolved Issues: Fixed an issue that caused unnecessary execution when a test stage was set for the coverage collector.
3.14.1	September 25, 2025	New Features and Updates: Added an option to save coverage collector sessions when using the start-session command.
3.14.0	September 5, 2025	New Features and Updates: Added support for loading predefined sessions from a settings file for the coverage collector. Improved handling of permission-related issues for the performance monitor. Resolved Issues: Fixed a rare CLR internal failure when requesting instrumentation before CoreLib was loaded. Applied ongoing security fixes.
3.13.2	August 4, 2025	New Features and Updates: Added support for reporting parallel test events for xUnit, NUnit, and MSTest. Added support for build and branch parameters in pull request configuration. Added the ability to configure a profiler process filter for all agent modes. Resolved Issues: Fixed a rare race condition when multiple active sessions started simultaneously.
3.13.1	July 21, 2025	New Features and Updates: Added support for MSTest V1 test event reporting when using the vstest.console runner. Resolved Issues: Fixed startup logger file creation, ensuring logs are written to a single file. Fixed PIC mode behavior to prevent attaching to the coverage collector service process.
3.13.0	June 25, 2025	New Features and Updates: Added support for parallel test stages. Added the testProjectId parameter. Improved tagging for instrumented processes. Added the agent version to metadata headers. Added support for the --testStage parameter for the testListener command. Resolved Issues: Fixed an issue with dummy execution handling.
3.12.4	June 17, 2025	Resolved Issues: Fixed an issue with submitting buildmaps for the CD Agent.
3.12.3	June 11, 2025	Resolved Issues: Fixed an issue with passing labId to the coverage collector service.
3.12.2	June 4, 2025	New Features and Updates: Added namespace suggestions during scan operations.
3.12.1	May 23, 2025	New Features and Updates: Added missing multiprofiler binaries to the Windows release. Resolved Issues: Fixed initial footprint handling for footprints v6. Fixed resolving IP addresses for IPC with remote instances.
3.12.0	May 7, 2025	New Features and Updates: Upgraded the agent to .NET 9.0. Added support for .NET 9.0 distroless images.
3.11.4	April 24, 2025	New Features and Updates: Added support for older Linux OS versions (GLIBCXX_3.4.25). Added the ability to configure the agent remotely. Added an alias for the labId environment variable.
3.11.3	April 11, 2025	New Features and Updates: Improved applied configuration logging. Resolved Issues: Fixed multiprofiler compatibility with Datadog on Linux.
3.11.2	March 21, 2025	New Features and Updates: Added options for selecting a profiler by runtime. Added support for specifying wildcard filters for collector service sessions.
3.11.1	March 10, 2025	Resolved Issues: Fixed an issue with submitting build maps for the CD Agent. Fixed vulnerabilities in third-party dependencies.
3.11.0	February 5, 2025	New Features and Updates: Improved profiler logging configuration. Added a startup logger for the collector to assist with debugging PIC mode. Added initial support for line coverage. Added clock synchronization support. Resolved Issues: Fixed a multiprofiler loading issue on Windows.

2024 Release Notes

Version	Date	Changes
3.10.2	December 3, 2024	New Features and Updates: Added support for context and contextType fields for IPC and Collector. Added DLL target for IPC library and sample integration application. Added IPv6 support for background test listener mode. Resolved Issues: Fixed representation of generic types in test names.
3.10.1	October 21, 2024	New Features and Updates: Added multi-profiler DLLs to the SL.DotNet package. Security updates.
3.10.0	September 30, 2024	New Features and Updates: Added support for Footprints v6 protocol.
3.9.15	September 2, 2024	New Features and Updates: Added info executor for detailed Coverage Collector Service status tracking. Resolved Issues: Fixed issue with pending sessions in Coverage Collector Service.
3.9.14	September 2, 2024	Resolved Issues: Fixed agent startup issue on machines with configured dotnet dev environment.
3.9.13	August 5, 2024	New Features and Updates: Added option to ignore false code modifications caused by DisplayClass index. Resolved Issues: Fixed issue with specifying token file over environment variables.
3.9.12	July 29, 2024	New Features and Updates: Added support for running the .NET Core agent on read-only filesystems. Security updates.
3.9.10	June 24, 2024	Resolved Issues: Fixed handling of test event sending for test stages opened on integration labs.
3.9.9	June 18, 2024	New Features and Updates: Added support for configuring logger using a relative path. Resolved Issues: Fixed issue with uploadReport mode.
3.9.8	June 14, 2024	New Features and Updates: Improved IPC communication and keep-alive timeout handling. Improved TIA timeout handling to respect configured limits. Updated dependencies and security improvements.
3.9.7	May 23, 2024	New Features and Updates: Added ability to start execution using integrationLabId without bsid (startExecution command).
3.9.6	May 15, 2024	New Features and Updates: Added Sealights metadata headers to API requests. Added logDir and logPreset options for simplified logger configuration. Resolved Issues: Improved memory usage of logging mechanism. Changed default log level to Info .
3.9.5	March 28, 2024	New Features and Updates: Added profiler attachment to service report service name tags. Resolved Issues: Improved handling of Collector Service responses after session start/stop. Improved IPC connection error handling and log messages.
3.9.4	March 4, 2024	New Features and Updates: Improved labId resolution for CD Agent mode. Updated dependencies and security improvements.