[#0166] feat(leetcode): init project

problems/0166-fraction-to-recurring-decimal/csharp/Program.cs

@@ -0,0 +1,24 @@
+// LeetCode 166: Fraction To Recurring Decimal
+// 難度: Medium
+// 日期: 2025-09-24
+
+using System;
+using System.Collections.Generic;
+using System.Linq;
+
+public class Solution {
+    // TODO: 根據題意調整簽名
+    public int Solve(int[] nums) {
+        // 實作解法
+        return 0;
+    }
+}
+
+public class Program {
+    public static void Main() {
+        var s = new Solution();
+        // TODO: 可加入簡單輸入/輸出測試
+        Console.WriteLine("Hello LeetCode 166!");
+    }
+}
+