feat: library example

example/csharp/NeteaseCrypt.cs

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+using System;
+using System.Runtime.InteropServices;
+
+namespace libncmdump_demo_cli
+{
+    /// <summary>
+    /// NeteaseCrypt C# Wrapper
+    /// </summary>
+    class NeteaseCrypt
+    {
+        const string DLL_PATH = "libncmdump.dll";
+
+        [DllImport(DLL_PATH, CallingConvention = CallingConvention.Cdecl)]
+        private static extern IntPtr CreateNeteaseCrypt(IntPtr path);
+
+        [DllImport(DLL_PATH, CallingConvention = CallingConvention.Cdecl)]
+        private static extern int Dump(IntPtr NeteaseCrypt);
+
+        [DllImport(DLL_PATH, CallingConvention = CallingConvention.Cdecl)]
+        private static extern void FixMetadata(IntPtr NeteaseCrypt);
+
+        [DllImport(DLL_PATH, CallingConvention = CallingConvention.Cdecl)]
+        private static extern void DestroyNeteaseCrypt(IntPtr NeteaseCrypt);
+
+        private IntPtr NeteaseCryptClass = IntPtr.Zero;
+
+        /// <summary>
+        /// 创建 NeteaseCrypt 类的实例。
+        /// </summary>
+        /// <param name="FileName">网易云音乐 ncm 加密文件路径</param>
+        public NeteaseCrypt(string FileName)
+        {
+            NeteaseCryptClass = CreateNeteaseCrypt(Marshal.StringToHGlobalAnsi(FileName));
+        }
+
+        /// <summary>
+        /// 启动转换过程。
+        /// </summary>
+        /// <returns>返回一个整数，指示转储过程的结果。如果成功，返回0；如果失败，返回1。</returns>
+        public int Dump()
+        {
+            return Dump(NeteaseCryptClass);
+        }
+
+        /// <summary>
+        /// 修复音乐文件元数据。
+        /// </summary>
+        public void FixMetadata()
+        {
+            FixMetadata(NeteaseCryptClass);
+        }
+
+        /// <summary>
+        /// 销毁 NeteaseCrypt 类的实例。
+        /// </summary>
+        public void Destroy()
+        {
+            DestroyNeteaseCrypt(NeteaseCryptClass);
+        }
+    }
+}

example/csharp/Program.cs

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+using System;
+using System.Threading.Tasks;
+
+namespace libncmdump_demo_cli
+{
+    internal class Program
+    {
+        static void Main(string[] args)
+        {
+            // 文件名
+            string filePath = "test.ncm";
+
+            // 创建 NeteaseCrypt 类的实例
+            NeteaseCrypt neteaseCrypt = new NeteaseCrypt(filePath);
+
+            // 启动转换过程
+            int result = neteaseCrypt.Dump();
+
+            // 修复元数据
+            neteaseCrypt.FixMetadata();
+
+            // [务必]销毁 NeteaseCrypt 类的实例
+            neteaseCrypt.Destroy();
+        }
+    }
+}