docs(10_Wiki): 위키 구조 정리 — 언어 튜토리얼 카테고리 폴더 제거 + 신규 자산 동기화

Topic_CSS/Topic_HTML/Topic_JavaScript/Topic_Prompt/Topic_Comfyui 등 기존 카테고리 폴더를 정리하고, Topic_Graphic/Dev 등 신규 산출물과 Topics 내부 세션/메모리 기록을 동기화.
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+---
+id: csharp-variables-constants
+title: "C# Constants"
+category: "Programming_Language"
+status: "draft"
+verification_status: "conceptual"
+canonical_id: ""
+aliases: ["const keyword C#", "C# 상수"]
+duplicate_of: ""
+source_trust_level: "B"
+confidence_score: 0.84
+created_at: 2026-07-04
+updated_at: 2026-07-04
+review_reason: ""
+merge_history: []
+tags: ["csharp", "programming-language", "w3schools", "constants"]
+raw_sources: ["https://www.w3schools.com/cs/cs_variables_constants.php"]
+applied_in: []
+github_commit: ""
+---
+
+# [[CSharp Constants]]
+
+## 🎯 한 줄 통찰 (One-line insight)
+C#'s `const` keyword is placed BEFORE the type (`const int myNum = 15;`), exactly mirroring C's `const int` and C++'s identical placement — but C# adds a strictness neither predecessor enforces at the same chapter level: a `const` MUST be initialized at declaration, with no separate "declare now, assign later" escape hatch, producing a hard compiler error ("A const field requires a value to be provided") rather than the vaguer undefined/uninitialized-value risk C's const-without-init could silently create. [S1]
+
+## 🧠 핵심 개념 (Core concepts)
+- **`const` keyword** — placed before the variable type, makes the variable unchangeable and read-only after its initial assignment. [S1]
+- **Mandatory initialization** — a `const` MUST be assigned a value at the point of declaration; declaring one without a value is a compile error. [S1]
+- **Use case** — values that should never change, like PI (3.14159...), protecting code from accidental overwrites by the same or other developers. [S1]
+
+## 📖 세부 내용 (Details)
+- Declaration + illegal reassignment: `const int myNum = 15; myNum = 20; // error`. [S1]
+- Explicit error message quoted from the compiler: "A const field requires a value to be provided" when a const is declared without a value. [S1]
+
+## ⚖️ 모순 및 업데이트 (Contradictions & updates)
+- **초기화 없는 const 선언이 하드 에러로 즉시 차단됨**: C의 `const int x;`는 선언 자체는 허용되고 이후 대입이 불가능해 초기화되지 않은 값이 남는 위험이 있었지만, C#은 초기화 없는 const 선언 자체를 컴파일 에러로 명시적으로 차단한다는 점이 이번 챕터에서 확인됨. [S1]
+
+## 🛠️ 적용 사례 (Applied in summary)
+현재 발견된 실제 적용 사례가 없습니다 — PI처럼 절대 변하지 않아야 하는 값의 예시로 const 사용이 원문에서 언급됨. [S1]
+
+## 💻 코드 패턴 (Code patterns)
+const requires initialization at declaration — no exceptions (C#):
+```csharp
+const int myNum = 15;
+myNum = 20; // error - cannot assign to a const variable
+```
+
+## ✅ 검증 상태 및 신뢰도
+- **상태:** draft
+- **검증 단계:** conceptual
+- **출처 신뢰도:** B (W3Schools — widely used educational reference, not a primary standards body)
+- **신뢰 점수:** 0.84
+- **중복 검사 결과:** 신규 생성 (New discovery)
+
+## 🔗 지식 그래프 (Knowledge Graph)
+- **상위/루트:** [[C# Tutorial]]
+- **관련 개념:** [[CSharp Variables Identifiers]], [[CSharp Variables Display]], [[C Constants]]
+- **참조 맥락:** Variables 섹션 — Display Variables 챕터로 이어짐.
+
+## 📚 출처 (Sources)
+- [S1] W3Schools — C# Constants — https://www.w3schools.com/cs/cs_variables_constants.php
+
+## 📝 변경 이력 (Change history)
+- 2026-07-04: Initial draft synthesized from the W3Schools "C# Constants" page (Astra wiki-curation, P-Reinforce v3.1 format).