🚀 Faster, Smarter, and Ready for .NET 10 & Visual Studio 2026
Typemock Isolator 9.4 is here built to keep your team ahead as the .NET ecosystem accelerates.
This release focuses on platform compatibility, developer experience, and test-runner stability, with deep updates to our core, SmartRunner and our installer.
Whether you’re testing complex legacy systems or pushing into .NET 10 and Visual Studio 2026 Insiders, this update makes your workflow smoother, faster, and more predictable.
💡 What’s New in Typemock Isolator 9.4
✅ Ready for .NET 10 and Visual Studio 2026
We now support the newest runtimes and IDEs:
- .NET 10
- Visual Studio 2026 Insiders
- VSTest 4
This means you can upgrade your development environment without breaking your test suite.
# Installing the latest version
Install-Package Typemock.Isolator -Version 9.4.0
⚡ SmartRunner Now Adapts Automatically to Your Project Runtime
SmartRunner now runs under the same .NET runtime as your test project.
Why this matters
Previously, mismatched runtimes could cause inconsistent behavior especially in multi-TFM solutions.
Now SmartRunner aligns itself automatically:
- No manual configuration
- No unexpected x86 launches
- No runtime mismatch errors
This significantly improves test reliability.
<PropertyGroup>
<TargetFramework>net8.0</TargetFramework>
</PropertyGroup>
<!-- SmartRunner automatically uses net8.0 too -->
🛠️ Better Architecture Selection (Auto/x86/x64)
We’ve upgraded the Auto mode to make smarter decisions when choosing the architecture at runtime.
This eliminates cases where SmartRunner unnecessarily launched as x86.
Result: fewer edge-case failures and more predictable behavior in mixed architecture environments.
📦 Cleaner Installer & Uninstall Flow
A major theme in this release is predictability.
We improved:
- Full cleanup of all directories on uninstall
- More reliable detection of Visual Studio 2026 installations
- Better fallback behavior when probing for components
- Improved help/documentation build pipeline
If you’ve ever managed enterprise rollouts of extensions, you’ll feel the difference immediately.
📚 Documentation & Examples Improved
We updated:
- Example projects (cleaner, simplified, coverage-ready)
- Help docs (alignment fixes)
🔧 Stability Fixes Across the Board
Isolator 9.4 includes targeted fixes in SmartRunner, the installer, and the Visual Studio extension.
Key fixes:
- SmartRunner no longer restarts after build
- SmartRunner stops correctly when build fails
- Logging disabled = logging truly disabled
- Removed old
Marshal.ReleaseComObject code
- Fixed null-reference issues in several edge cases
- Fixed VS extension images
- Fixed .NET x86 runtime selection confusion
- Core runner logs no longer always emitted
This release reflects weeks of internal testing across multiple TFMs and architectures.
📦 NuGet Package Improvements
This version includes a fully modernized NuGet package structure:
- README displayed directly in NuGet
- Embedded icon
- License file included
- TFMs updated (net45, net6.0, net8.0, net10.0)
- Cleaner dependency groups
We also simplified TFM mappings so all modern .NET versions share a consistent dependency set.
🚀 Start Testing Smarter Today
Typemock Isolator 9.4 is available now:
👉 Download: https://www.typemock.com/download-isolator
👉 NuGet: https://www.nuget.org/packages/Typemock.Isolator
👉 Docs: https://www.typemock.com/docs
Whether you’re maintaining a massive legacy system or building tomorrow’s .NET applications, Isolator continues to be the most powerful mocking framework ever created.
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