Diagnostic when FormattableStringFactory is missing should mention platform version

描述

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贡献者指南

技术栈

csharp

领域

toolingdeveloper experience

议题类型

feature

难度面向新贡献者的预计实现难度，1 表示很小改动，5 表示专家级工作。

3

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1-3 hours

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stale

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clear

前置要求

C# knowledgeRoslyn diagnostic internals

新手友好度1-100 的估计分数，表示该议题对首次贡献者的友好程度。

40

研究方向

The issue requests that the diagnostic for missing FormattableStringFactory should include the platform version. Likely requires modifying the diagnostic message in the relevant code file (e.g., in the compiler's error reporting). Look for where FormattableStringFactory is referenced in the codebase and update the corresponding error string. Since there is no body, clarify with maintainers if a specific format is expected.