Clarify private constants use PascalCase; fix public field casing in const example

[Copilot]

The identifier names page didn't explicitly resolve whether private constants should follow the _camelCase rule for private fields or the PascalCase rule for constants. The const keyword example also showed public fields named x/y instead of the PascalCase X/Y.

Changes

• identifier-names.md

  • Updated camelCase and PascalCase bullets to explicitly scope each rule: _camelCase applies to private non-constant fields; PascalCase applies to constants regardless of access modifier

  • Added a [!NOTE] callout in the Camel case section with a side-by-side example:

    public class DataService
    {
        private const int MaxRetryCount = 3;   // PascalCase for constants
        private IWorkerQueue _workerQueue;     // _camelCase for non-constant fields
    }

• csrefKeywordsModifiers.cs (snippet 5) — Renamed public fields x/y → X/Y and updated all usages and the output comment to match

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Internal previews

📄 File	🔗 Preview link
docs/csharp/fundamentals/coding-style/identifier-names.md	C# identifier naming rules and conventions

[Copilot]

Pull request overview

This PR clarifies the C# identifier naming guidance around constants (PascalCase regardless of accessibility) and updates a const keyword snippet to use PascalCase for public fields to match the documented convention.

Changes:

• Clarifies that _camelCase applies to private non-constant fields, while constants use PascalCase even when private or internal.
• Adds a NOTE callout example demonstrating private constant vs. private field naming.
• Fixes x/y → X/Y in the const keyword snippet and updates related output text.

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 2 comments.

File	Description
docs/csharp/fundamentals/coding-style/identifier-names.md	Refines the written naming rules and adds an example callout to disambiguate private constants vs. fields.
docs/csharp/language-reference/keywords/snippets/csrefKeywordsModifiers.cs	Updates the const example to use PascalCase for public fields and aligns output text.