docs(10_Wiki): Dev 폴더 누락분 반영 — Topic_Programming으로 통합

이전 재구성 작업에서 Dev/ 폴더가 누락되었던 것을 반영.

- Dev/Topic_Programming(중첩 폴더, 78개)은 Dev 자체 최상위 폴더들
  (Architecture/Conventions/Engineering_Intelligence 등)과 완전 중복이라 제거.
- Dev 최상위 엔지니어링 지식 폴더(Architecture/Conventions/Engineering_Intelligence/
  Failure_Library/Generalized_Principles/Language/Pattern_Catalog/Platform_Guides/
  Subsystems, 77개)는 이미 Topic_Programming/Topic_Programming에 더 최신 버전이
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  JavaScript/PHP/Python/SQL/W3CSS, 1201개)는 전부 Topic_Programming 하위로 이동.
- 에이전트 운영 상태(.astra/docs)는 그대로 유지, 콘텐츠 폴더만 정리.
- Topic_Programming 최종 문서 수: 2784 → 3985.

10_Wiki/Topic_Programming/Topic_CSharp/CSharp_Variables_Identifiers.md

@@ -0,0 +1,69 @@
+---
+id: csharp-variables-identifiers
+title: "C# Identifiers"
+category: "Programming_Language"
+status: "draft"
+verification_status: "conceptual"
+canonical_id: ""
+aliases: ["variable naming rules C#", "C# 식별자"]
+duplicate_of: ""
+source_trust_level: "B"
+confidence_score: 0.83
+created_at: 2026-07-04
+updated_at: 2026-07-04
+review_reason: ""
+merge_history: []
+tags: ["csharp", "programming-language", "w3schools", "identifiers", "naming"]
+raw_sources: ["https://www.w3schools.com/cs/cs_variables_identifiers.php"]
+applied_in: []
+github_commit: ""
+---
+
+# [[CSharp Identifiers]]
+
+## 🎯 한 줄 통찰 (One-line insight)
+C#'s identifier rules (letters/digits/underscore, must start with letter/underscore, case-sensitive, no reserved words) are the same rule-set every C-family language in this series has used verbatim — the interesting detail isn't the rule itself but the STYLE convention layered on top: C# explicitly recommends lowercase-starting names (camelCase, e.g. `minutesPerHour`), which will matter later when C#'s method/class names are shown starting with an UPPERCASE letter (PascalCase) — a naming-convention split by identifier kind that C and C++ never enforced this explicitly. [S1]
+
+## 🧠 핵심 개념 (Core concepts)
+- **Identifier** — the unique name given to a variable. [S1]
+- **Character rules** — letters, digits, and underscore (`_`) allowed; must begin with a letter or underscore (never a digit). [S1]
+- **Case sensitivity** — `myVar` and `myvar` are distinct variables. [S1]
+- **No whitespace** — names cannot contain spaces. [S1]
+- **No reserved words** — C# keywords like `int` or `double` cannot be used as identifier names. [S1]
+- **Style convention (recommended, not enforced)** — start with a lowercase letter; prefer descriptive names (`minutesPerHour`) over terse ones (`m`) for readability and maintainability. [S1]
+
+## 📖 세부 내용 (Details)
+- Good vs. acceptable naming contrast: `int minutesPerHour = 60; // Good` vs `int m = 60; // OK, but not so easy to understand`. [S1]
+
+## ⚖️ 모순 및 업데이트 (Contradictions & updates)
+- **명명 규칙 자체는 C/C++/Java와 동일**: 문자/숫자/언더스코어, 숫자로 시작 불가, 대소문자 구분, 예약어 사용 불가라는 규칙이 이전 언어들과 동일함이 확인됨 — 차이는 규칙이 아니라 스타일 권장(lowercase 시작, 서술적 이름 선호)에 있음. [S1]
+
+## 🛠️ 적용 사례 (Applied in summary)
+현재 발견된 실제 적용 사례가 없습니다 — minutesPerHour vs m 이름 비교가 원문에서 스타일 예제로 제시됨. [S1]
+
+## 💻 코드 패턴 (Code patterns)
+Descriptive vs. terse identifier naming (C#):
+```csharp
+// Good
+int minutesPerHour = 60;
+// OK, but not so easy to understand what m actually is
+int m = 60;
+```
+
+## ✅ 검증 상태 및 신뢰도
+- **상태:** draft
+- **검증 단계:** conceptual
+- **출처 신뢰도:** B (W3Schools — widely used educational reference, not a primary standards body)
+- **신뢰 점수:** 0.83
+- **중복 검사 결과:** 신규 생성 (New discovery)
+
+## 🔗 지식 그래프 (Knowledge Graph)
+- **상위/루트:** [[C# Tutorial]]
+- **관련 개념:** [[CSharp Variables]], [[CSharp Variables Constants]]
+- **참조 맥락:** Variables 섹션 — Constants 챕터로 이어짐.
+
+## 📚 출처 (Sources)
+- [S1] W3Schools — C# Identifiers — https://www.w3schools.com/cs/cs_variables_identifiers.php
+
+## 📝 변경 이력 (Change history)
+- 2026-07-04: Initial draft synthesized from the W3Schools "C# Identifiers" page (Astra wiki-curation, P-Reinforce v3.1 format).