From c65c35e26d3c8e641c194c513dae2fc73fd608e9 Mon Sep 17 00:00:00 2001
From: Oliver Wong <htw128@live.com>
Date: Tue, 10 Mar 2026 15:41:02 +0800
Subject: [PATCH] =?UTF-8?q?=E6=8F=90=E4=BA=A4=E9=81=97=E6=BC=8F=E6=96=87?=
 =?UTF-8?q?=E4=BB=B6?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 ExcelTool/StringExtensions.cs | 32 ++++++++++++++++++++++++++++++++
 1 file changed, 32 insertions(+)
 create mode 100644 ExcelTool/StringExtensions.cs

diff --git a/ExcelTool/StringExtensions.cs b/ExcelTool/StringExtensions.cs
new file mode 100644
index 0000000..b2303b4
--- /dev/null
+++ b/ExcelTool/StringExtensions.cs
@@ -0,0 +1,32 @@
+using System.Globalization;
+
+namespace ExcelTool;
+
+public static class StringExtensions
+{
+    /// <summary>
+    /// 将 PascalCase 字符串转换为 camelCase
+    /// </summary>
+    public static string ToCamelCase(this string input)
+    {
+        if (string.IsNullOrEmpty(input))
+        {
+            return input;
+        }
+
+        // 如果第一个字符已经是小写，或者不是字母，直接返回（避免不必要的操作）
+        if (!char.IsUpper(input[0]))
+        {
+            return input;
+        }
+
+        // 特殊情况：如果字符串只有一个字符且是大写，直接转小写
+        if (input.Length == 1)
+        {
+            return input;
+        }
+
+        // 将第一个字符转小写，拼接剩余部分
+        return char.ToLower(input[0], CultureInfo.InvariantCulture) + input.Substring(1);
+    }
+}
\ No newline at end of file