assembly load程序集通过Assembly.Load方法加载，不用时怎么卸载

程序集通过Assembly.Load方法加载，不用时怎么卸载

//Entry Point : [DllImport("TEST.dll", PreserveSig = true, CharSet = CharSet.Ansi, CallingConvention = CallingConvention.StdCall, EntryPoint = "GetName")] public static extern short GetName(ushort adr); //AssemblyLoad : Assembly ass = Assembly.LoadFile(dllPath); Object instance = ass.CreateInstance(className); //创建一个实例 Type type = ass.GetType(className); public string GetName(int index) { object[] args = { index }; object obj = type.InvokeMember(methodName, BindingFlags.Default | BindingFlags.InvokeMethod, null, instance, args); return (string)obj; }