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Document roslyn telemetry #55359

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Document roslyn telemetry
jjonescz Aug 11, 2026
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Add AI usage tag
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12 changes: 11 additions & 1 deletion docs/core/tools/telemetry.md
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title: .NET SDK and .NET CLI telemetry
description: The .NET SDK and the .NET CLI collect usage information and send it to Microsoft. Learn what data is collected and how to opt out.
author: KathleenDollard
ms.date: 10/07/2025
ms.date: 08/11/2026
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ai-usage: ai-assisted
---
# .NET SDK and .NET CLI telemetry

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The following tabs show the telemetry data captured by SDK version:

# [.NET 11](#tab/dotnet11)

- **SDK version 11.0.100 and later:**
- Roslyn compiler output cache telemetry:
- Whether the compiler found and restored a cached compilation result.
- The outcome of an attempt to store a compilation result in the cache.
- The compiler language (C# or Visual Basic).
- Time spent computing the cache key, restoring a cached result, storing a result, and compiling and emitting on a cache miss.

# [.NET 10](#tab/dotnet10)

- **SDK version 10.0.100 and later:**
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