C#使用反射使用类的函数

using System.Reflection;
object instance;
......
private void Ini()
{
    string str = System.IO.Directory.GetCurrentDirectory()+ "/det.dll";
    Assembly asm = Assembly.LoadFile(str);
    var type = asm.GetType("Test.Det"); //
    instance = asm.CreateInstance("Test.Det");
    var method = type.GetMethod("Ini");
    //调用方法的一些标志位，这里的含义是Public并且是实例方法，这也是默认的值
    BindingFlags flag = BindingFlags.Public | BindingFlags.Instance;
    object[] parameters = new object[] { "", "./model/deploy.pkl", (uint)0};
    object returnIng =  method.Invoke(instance, flag, Type.DefaultBinder, parameters, null);
    Console.WriteLine(returnIng); //Int类型
}
//  检测
private void Det(object sender, EventArgs e)
{
     string str = System.IO.Directory.GetCurrentDirectory()+ "/det.dll";
     Assembly asm = Assembly.LoadFile(str);
     var type = asm.GetType("Test.Det"); //命名空间
     var method = type.GetMethod("Detect");
     //调用方法的一些标志位，这里的含义是Public并且是实例方法，这也是默认的值
     BindingFlags flag = BindingFlags.Public | BindingFlags.Instance;
     Bitmap bitmap = new Bitmap(@"/000001.jpg");
     object[] parameters = new object[] {bitmap, (uint)640, 0.3f };
     object returnIng = method.Invoke(instance, flag, Type.DefaultBinder, parameters, null);
     List<double> result = (List<double>)returnIng;
     Console.WriteLine(result.Count / 6);
}