diff --git a/Windows/CS/Framework4.0/Utils/Utils.ico b/Windows/CS/Framework4.0/Utils/Utils.ico
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diff --git a/Windows/CS/Framework4.0/Utils/Utils.sln b/Windows/CS/Framework4.0/Utils/Utils.sln
new file mode 100644
index 0000000..9b8e42a
--- /dev/null
+++ b/Windows/CS/Framework4.0/Utils/Utils.sln
@@ -0,0 +1,25 @@
+
+Microsoft Visual Studio Solution File, Format Version 12.00
+# Visual Studio 15
+VisualStudioVersion = 15.0.36617.4
+MinimumVisualStudioVersion = 10.0.40219.1
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Utils", "Utils\Utils.csproj", "{0AAA20B8-F8B1-4C09-ADBF-E6FD650EE9D4}"
+EndProject
+Global
+ GlobalSection(SolutionConfigurationPlatforms) = preSolution
+ Debug|Any CPU = Debug|Any CPU
+ Release|Any CPU = Release|Any CPU
+ EndGlobalSection
+ GlobalSection(ProjectConfigurationPlatforms) = postSolution
+ {0AAA20B8-F8B1-4C09-ADBF-E6FD650EE9D4}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+ {0AAA20B8-F8B1-4C09-ADBF-E6FD650EE9D4}.Debug|Any CPU.Build.0 = Debug|Any CPU
+ {0AAA20B8-F8B1-4C09-ADBF-E6FD650EE9D4}.Release|Any CPU.ActiveCfg = Release|Any CPU
+ {0AAA20B8-F8B1-4C09-ADBF-E6FD650EE9D4}.Release|Any CPU.Build.0 = Release|Any CPU
+ EndGlobalSection
+ GlobalSection(SolutionProperties) = preSolution
+ HideSolutionNode = FALSE
+ EndGlobalSection
+ GlobalSection(ExtensibilityGlobals) = postSolution
+ SolutionGuid = {7019BD3D-89E7-4B0D-85B6-9E26BD8EF151}
+ EndGlobalSection
+EndGlobal
diff --git a/Windows/CS/Framework4.0/Utils/Utils/Properties/AssemblyInfo.cs b/Windows/CS/Framework4.0/Utils/Utils/Properties/AssemblyInfo.cs
new file mode 100644
index 0000000..5a6fe04
--- /dev/null
+++ b/Windows/CS/Framework4.0/Utils/Utils/Properties/AssemblyInfo.cs
@@ -0,0 +1,36 @@
+using System.Reflection;
+using System.Runtime.CompilerServices;
+using System.Runtime.InteropServices;
+
+// 有关程序集的一般信息由以下
+// 控制。更改这些特性值可修改
+// 与程序集关联的信息。
+[assembly: AssemblyTitle("Net40通用工具库")]
+[assembly: AssemblyDescription("包含Base64、CRC编码等操作")]
+[assembly: AssemblyConfiguration("")]
+[assembly: AssemblyCompany("JoyD")]
+[assembly: AssemblyProduct("com.joyd.Utils")]
+[assembly: AssemblyCopyright("Copyright © 2025 JoyD")]
+[assembly: AssemblyTrademark("JoyD")]
+[assembly: AssemblyCulture("zh-CN")]
+
+// 将 ComVisible 设置为 false 会使此程序集中的类型
+//对 COM 组件不可见。如果需要从 COM 访问此程序集中的类型
+//请将此类型的 ComVisible 特性设置为 true。
+[assembly: ComVisible(false)]
+
+// 如果此项目向 COM 公开，则下列 GUID 用于类型库的 ID
+[assembly: Guid("0aaa20b8-f8b1-4c09-adbf-e6fd650ee9d4")]
+
+// 程序集的版本信息由下列四个值组成:
+//
+// 主版本
+// 次版本
+// 生成号
+// 修订号
+//
+// 可以指定所有值，也可以使用以下所示的 "*" 预置版本号和修订号
+//通过使用 "*"，如下所示:
+// [assembly: AssemblyVersion("1.0.*")]
+[assembly: AssemblyVersion("1.0.0.0")]
+[assembly: AssemblyFileVersion("1.0.0.0")]
diff --git a/Windows/CS/Framework4.0/Utils/Utils/Util.cs b/Windows/CS/Framework4.0/Utils/Utils/Util.cs
new file mode 100644
index 0000000..aadc160
--- /dev/null
+++ b/Windows/CS/Framework4.0/Utils/Utils/Util.cs
@@ -0,0 +1,215 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+
+namespace JoyD.Windows.CS
+{
+ ///
+ /// 通用工具和方法
+ ///
+ public static class Util
+ {
+ // CRC16/XMODEM算法实现（带起始位置和长度）
+ public static ushort CalculateCRC16(byte[] data, int startIndex, int length)
+ {
+ ushort crc = 0;
+ int endIndex = startIndex + length;
+ for (int i = startIndex; i < endIndex && i < data.Length; i++)
+ {
+ crc ^= (ushort)(data[i] << 8);
+ for (int j = 0; j < 8; j++)
+ {
+ if ((crc & 0x8000) != 0)
+ crc = (ushort)((crc << 1) ^ 0x1021);
+ else
+ crc <<= 1;
+ }
+ }
+ return crc;
+ }
+
+
+
+ // CRC32-MPEG2算法实现
+ public static uint CalculateCRC32(byte[] data)
+ {
+ return CalculateCRC32(0xFFFFFFFF, data);
+ }
+
+ // 支持增量计算的CRC32方法
+ public static uint CalculateCRC32(uint crc, byte[] data)
+ {
+ uint polynomial = 0x04C11DB7;
+
+ for (int i = 0; i < data.Length; i++)
+ {
+ crc ^= (uint)data[i] << 24;
+ for (int j = 0; j < 8; j++)
+ {
+ if ((crc & 0x80000000) != 0)
+ crc = (crc << 1) ^ polynomial;
+ else
+ crc <<= 1;
+ }
+ }
+ return crc;
+ }
+
+ // 计算文件的CRC32（通过文件路径）
+ public static uint CalculateFileCRC32(string filePath)
+ {
+ using (FileStream fs = new FileStream(filePath, FileMode.Open, FileAccess.Read))
+ {
+ return CalculateCRC32(fs);
+ }
+ }
+
+ // 计算文件的CRC32（通过已打开的文件流）
+ public static uint CalculateCRC32(FileStream fs)
+ {
+ uint crc = 0xFFFFFFFF;
+ uint polynomial = 0x04C11DB7;
+
+ // 保存当前位置
+ long originalPosition = fs.Position;
+
+ try
+ {
+ // 重置到文件开头
+ fs.Seek(0, SeekOrigin.Begin);
+
+ byte[] buffer = new byte[4096];
+ int bytesRead;
+
+ while ((bytesRead = fs.Read(buffer, 0, buffer.Length)) > 0)
+ {
+ for (int i = 0; i < bytesRead; i++)
+ {
+ crc ^= (uint)buffer[i] << 24;
+ for (int j = 0; j < 8; j++)
+ {
+ if ((crc & 0x80000000) != 0)
+ crc = (crc << 1) ^ polynomial;
+ else
+ crc <<= 1;
+ }
+ }
+ }
+ }
+ finally
+ {
+ // 恢复到原始位置
+ fs.Seek(originalPosition, SeekOrigin.Begin);
+ }
+ return crc;
+ }
+
+ // byte[]转base64编码
+ public static string ByteArrayToBase64(byte[] data)
+ {
+ return Convert.ToBase64String(data);
+ }
+
+ // base64转byte[]编码
+ public static byte[] Base64ToByteArray(string base64)
+ {
+ return Convert.FromBase64String(base64);
+ }
+
+ // 构建不含前缀的FTPC命令（返回byte[]，直接处理字节流）
+ public static byte[] BuildRawFTPCommand(char command, params object[] parameters)
+ {
+ using (MemoryStream ms = new MemoryStream())
+ {
+ // 写入命令（ASCII编码的单个字符）
+ ms.WriteByte((byte)command);
+
+ // 添加参数（参数之间没有间隔，直接写入字节）
+ foreach (var param in parameters)
+ {
+ if (param is long)
+ {
+ // filesize24或addr24: 3字节大端序
+ long value = (long)param;
+
+ // 使用位运算直接获取24位值的三个字节，大端序
+ byte byte1 = (byte)((value >> 16) & 0xFF); // 最高位字节
+ byte byte2 = (byte)((value >> 8) & 0xFF); // 中间字节
+ byte byte3 = (byte)(value & 0xFF); // 最低位字节
+
+ // 直接写入三个字节
+ ms.WriteByte(byte1);
+ ms.WriteByte(byte2);
+ ms.WriteByte(byte3);
+ }
+ else if (param is ushort)
+ {
+ // N16: 16位大端序数据长度
+ ushort value = (ushort)param;
+
+ // 使用位运算直接获取16位值的两个字节，大端序
+ byte byte1 = (byte)((value >> 8) & 0xFF); // 高8位字节
+ byte byte2 = (byte)(value & 0xFF); // 低8位字节
+
+ // 直接写入两个字节
+ ms.WriteByte(byte1);
+ ms.WriteByte(byte2);
+ }
+ else if (param is uint)
+ {
+ // 处理uint类型（如CRC32值）
+ uint value = (uint)param;
+
+ // 使用位运算直接获取32位值的四个字节，大端序
+ byte byte1 = (byte)((value >> 24) & 0xFF); // 最高位字节
+ byte byte2 = (byte)((value >> 16) & 0xFF); // 次高位字节
+ byte byte3 = (byte)((value >> 8) & 0xFF); // 次低位字节
+ byte byte4 = (byte)(value & 0xFF); // 最低位字节
+
+ // 直接写入四个字节
+ ms.WriteByte(byte1);
+ ms.WriteByte(byte2);
+ ms.WriteByte(byte3);
+ ms.WriteByte(byte4);
+ }
+ else if (param is string)
+ {
+ // 字符串参数直接写入ASCII字节
+ string strValue = (string)param;
+ byte[] strBytes = Encoding.ASCII.GetBytes(strValue);
+ ms.Write(strBytes, 0, strBytes.Length);
+ }
+ else if (param is byte[])
+ {
+ // byte[]参数直接写入
+ byte[] data = (byte[])param;
+ ms.Write(data, 0, data.Length);
+ }
+ }
+
+ // 获取当前流中的所有字节，用于计算CRC16
+ byte[] currentBytes = ms.ToArray();
+
+ // 计算CRC16
+ ushort crc16 = CalculateCRC16(currentBytes, 0, currentBytes.Length);
+
+ // 写入CRC16（大端序）
+ byte crcByte1 = (byte)((crc16 >> 8) & 0xFF); // 高8位
+ byte crcByte2 = (byte)(crc16 & 0xFF); // 低8位
+ ms.WriteByte(crcByte1);
+ ms.WriteByte(crcByte2);
+
+ // 返回完整的字节数组
+ return ms.ToArray();
+ }
+ }
+
+ // 构建完整通信命令（接受byte[]输入）
+ public static string BuildCommunicationCommand(byte[] rawFTPCommand)
+ {
+ string base64 = Convert.ToBase64String(rawFTPCommand);
+ return $"set(LFMGR: FTPC, \"{base64}\")";
+ }
+ }
+}
diff --git a/Windows/CS/Framework4.0/Utils/Utils/Utils.csproj b/Windows/CS/Framework4.0/Utils/Utils/Utils.csproj
new file mode 100644
index 0000000..2fcb5cf
--- /dev/null
+++ b/Windows/CS/Framework4.0/Utils/Utils/Utils.csproj
@@ -0,0 +1,54 @@
+
+
+
+
+ Debug
+ AnyCPU
+ {0AAA20B8-F8B1-4C09-ADBF-E6FD650EE9D4}
+ Library
+ Properties
+ JoyD.Windows.CS
+ Utils
+ v4.0
+ 512
+ true
+
+
+ true
+ full
+ false
+ bin\Debug\
+ DEBUG;TRACE
+ prompt
+ 4
+ bin\Debug\Utils.xml
+
+
+ pdbonly
+ true
+ bin\Release\
+ TRACE
+ prompt
+ 4
+
+
+ Utils.ico
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
\ No newline at end of file
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