Claude Visual Studio 2026

Your Claude subscription.
Inside Visual Studio.

Use the Claude subscription you already have for C# and .NET in Visual Studio 2026. iolys brings Claude Code into your IDE, with your remaining quota, model controls, tools, and skills close to your code.

BRING YOUR OWN SUBSCRIPTION Your Claude account. Your existing access.

Sign in with an eligible Claude subscription. Your work uses that account’s Claude Code allowance; no API key is needed for this connection.

How subscription access works ↗
Your Claude allowance, in your IDE
ClaudeCode Usage showing Claude Pro, 63 percent remaining on the 5-hour quota and 97 percent remaining on the 7-day quota, with reset times.
Real iolys capture · example account values.Click to enlarge ↗
Percentage remaining5-hour & 7-day windowsReset times

01 / Remaining quota

Know what is left.
Know when it resets.

Open Show usage from the chat toolbar. See the allowance reported by your Claude account without leaving your solution.

USED & REMAINING

Read both sides of your quota.

Each usage window shows the percentage consumed and the percentage remaining. In the capture above, 37% used means 63% remaining in the five-hour window.

5 HOURS & 7 DAYS

Keep each limit in view.

Follow the shorter window alongside your weekly allowance. Reset dates appear in your local time, so you can see when each window renews.

YOUR CLAUDE ACCOUNT

See the subscription-wide picture.

These quotas are shared across Claude and Claude Code. iolys reads your account’s reported usage when you open the window.

ADDITIONAL LIMITS

Get the detail your plan reports.

Model-specific weekly limits and enabled monthly extra usage appear when available. The view follows the quotas returned for your account.

The screenshot is an example captured on September 15, 2026. Your plan, limits, and remaining allowance may differ. All currently available iolys features are free; your Claude subscription remains separate.

Claude’s subscription usage guidance ↗

02 / Inside Visual Studio

Claude, connected
to the way you work.

Keep your conversation beside your C# and .NET solution. Give Claude the relevant context and follow its work through the iolys interface.

  • Start with your code.Type # to reference a file, attach the active document or selection, or add an image to explain what you need.
  • Build on the IDE’s tools.Let Claude use your enabled iolys tools to explore files, edit code, run builds, and run tests.
  • Follow every step.Responses, thinking, tool activity, and permission requests appear in the same conversation. Your selected agent and tool controls apply to Claude’s work.
  • Keep the conversation going.Return to an earlier task through chat history. Model and effort changes preserve the Claude session.
YOUR C# & .NET WORKSPACEClaude Code
Ask ClaudeCode in iolys, with actions to explain a file, fix bugs, add tests, and refactor code, plus context and model controls.
Your prompt, context, and Claude connection.

03 / Models & reasoning effort

Choose the model.
Adjust the effort.

Open the model options beside your prompt. Claude’s supported settings stay within reach as you move from a quick question to a deeper investigation.

MODEL

Use the models in your Claude connection.

Choose from the models made available by Claude Code for your account. The picker keeps model selection in the same place as your other iolys providers.

EFFORT

Set the depth for the task.

Choose a supported reasoning effort beside the selected model. Give a difficult bug or a wider refactor the attention it needs.

CONTINUITY

Change settings. Keep your session.

Adjust the model or effort while retaining the Claude conversation. Check context-window usage from the composer as the task grows.

CLAUDE MODEL OPTIONSReasoning effort
Claude Code model options showing the default model and low, medium, high, xhigh, and max reasoning effort levels, with low selected.
Model and effort, in one menu.
TRY IT ON YOUR NEXT TASK

“Trace this failing test through the solution, fix the cause, and run the relevant tests.”

Choose your model, reasoning effort, and enabled tools before starting.

Model availability and effort levels depend on your account and the locally managed Claude Code CLI.

04 / Manage Providers

Your CLI.
Your choice of version.

iolys downloads and manages the Claude Code CLI locally from Manage Providers. Keep installation, updates, and version selection in one place.

INSTALLED VERSION

Check what is installed.

Compare your installed Claude Code CLI with the latest available version and see its update status.

UPDATE

Move to a newer release.

Select a newer available version and use the Update to action to install it locally.

ROLL BACK

Return to an earlier release.

Choose an older version from the list to see the Downgrade to action before applying the change.

LOCAL INSTALLATION

Manage the CLI used by iolys.

iolys maintains its own Claude Code installation. Changing its version leaves your separate personal Claude Code installation unchanged.

Selecting a release alone does not install it. Available versions follow the list in Manage Providers.

05 / Web tools & skills

Bring in the web.
Reuse your know-how.

Claude’s native web tools and your project skills work alongside the iolys tools for your solution. Manage them from Tools and Skills.

NATIVE WEB TOOLS

Research without breaking your flow.

Enable Web Search and Fetch URL independently under Model Tools. Ask Claude to find documentation or read a page, then apply what it learns to your code. Calls and results appear in the conversation.

TRY A PROMPT

“Read this library’s migration guide and identify what needs to change in my .NET project.”

PROJECT & IOLYS SKILLS

Bring your team’s instructions along.

Reuse iolys skills and supported project skills from .claude/skills and .agents/skills. Select one with /skill:name, or allow Claude to load a relevant skill automatically.

KEEP IT REUSABLE

Give a code review, testing workflow, or project convention a home your next task can use.

Skills load through iolys and use its enabled tools and permissions. Claude-specific hooks, shell interpolation, and skill model overrides are not applied.

Connect Claude

Connect your Claude subscription.

Install the official Claude Code CLI from the iolys provider panel, sign in, and choose your model. Setup stays inside your Visual Studio workflow.

  1. 01

    Open Manage Providers in iolys and add Claude Code (CLI).

  2. 02

    Install the locally managed CLI, choose Connect, and complete Claude’s browser sign-in with your subscription account.

  3. 03

    Select a Claude model and its reasoning effort, then start a task from your Visual Studio 2026 solution. Open Show usage to check your remaining allowance.

Claude FAQ

Claude and Visual Studio 2026.

Visit the official Claude website ↗
How can I use Claude in Visual Studio for C#?

Install the iolys extension for Visual Studio 2026 and open your C# solution. Open Manage Providers in iolys and add Claude Code (CLI). Install the locally managed CLI, choose Connect, and complete Claude’s browser sign-in with your subscription account. Select a Claude model and its reasoning effort, then start a task from your Visual Studio 2026 solution. Open Show usage to check your remaining allowance. You can then ask Claude to help with your C# and .NET code from the iolys workspace.

Is there a VSIX extension to use Claude in Visual Studio?

Yes. iolys is a VSIX extension for Visual Studio 2026, and Claude is one of the provider connections it ships with. Install the iolys VSIX once from the Visual Studio Marketplace, then add Claude from the Manage Providers panel; there is no separate VSIX per provider.

Does Claude work in Visual Studio 2026?

Yes, with the iolys extension. It connects the Claude Code CLI to Visual Studio 2026 and uses the Claude Code access included in your eligible subscription against the active C# or .NET solution, with your remaining quota, model and effort controls, tools, and skills in the IDE.

Can I use my Claude subscription in iolys?

Yes. Add Claude Code (CLI) and sign in with an eligible Claude account that includes Claude Code access. iolys supports the subscription connection for Pro, Max, Team, and Enterprise accounts, subject to your plan and organization’s access settings. Usage counts toward your Claude subscription’s allowance.

Do I need an Anthropic API key?

No. The Claude Code (CLI) provider uses your Claude subscription sign-in. The separate Anthropic provider is available for API-key access and its own billing.

Can I see the percentage of Claude quota remaining?

Yes. Open Show usage from the chat toolbar. ClaudeCode Usage displays both the percentage used and the percentage remaining for each reported window, including the 5-hour and 7-day limits, plus reset times in your local time. Model-specific weekly limits and enabled monthly extra usage appear when Claude reports them.

Are these limits specific to my iolys conversation?

No. These are account-wide subscription quotas shared across Claude and Claude Code. iolys reads the usage reported by Claude when you open the Usage window; the values are not estimates based on the current chat’s token count.

Can I change Claude models and reasoning effort?

Yes. Open the model options beside your prompt. Available models and effort levels come from your Claude Code connection. Changing them preserves the conversation’s Claude session.

How does Claude work with my Visual Studio solution?

Use # to reference files, or attach the active document, a selection, or an image. Claude uses the enabled iolys tools to read and edit code, run builds and tests, and work with your solution. Tool activity and permission requests appear in the conversation.

Does Claude support web search and skills in iolys?

Yes. Web Search and Fetch URL appear under Model Tools and can be enabled independently. Claude also uses iolys skills, including supported project skills from .claude/skills and .agents/skills. Select a skill with /skill:name or allow automatic activation. Claude-specific hooks and shell interpolation are not applied.

Do I need to install Claude Code separately?

No. Install and manage the official CLI locally from Manage Providers in iolys, then choose Connect. iolys manages its own Claude Code installation and sign-in.

Can I update or roll back the Claude Code CLI?

Yes. In Manage Providers, select Claude Code (CLI) to compare the installed and latest CLI versions. Select a newer available release to update, or an earlier release to display the Downgrade to action. Selecting a version alone does not install it; apply the change with the corresponding button. iolys manages its own installation, separately from your personal Claude Code installation.

What if Claude usage is unavailable?

Check the subscription connection and update the managed Claude Code CLI in Manage Providers, then reopen Usage. Usage reporting depends on a compatible CLI and Claude’s quota service. Missing values are shown as unavailable.

Is iolys free to use with Claude?

Yes. All currently available iolys features are free for personal and commercial use. Your Claude subscription supplies your AI access separately, and Claude’s plan eligibility and usage limits still apply.

Use Claude for C# and .NET without leaving Visual Studio 2026.

Keep your active solution, provider access, and development workflow.

Get iolys for Visual Studio 2026