feat: library example

example/csharp/Program.cs

@@ -0,0 +1,26 @@
+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();
+        }
+    }
+}