.net 通过反射创建开放实例委托

为什么以下

Delegate.CreateDelegate

生成运行时参数异常

static class Module1
{
    public static void Main()
    {
        MyDataObject mdo = new MyDataObject();
        mdo.DoMagic("Hello");
    }

    #region Assembly A
    public class BusinessObject
    {
    }

    public class MyBusinessObject : BusinessObject
    {

        public void DoMagic(string s)
        {
            Console.WriteLine(s);
        }
    }
    #endregion

    #region Assembly B
    public class MyDataObject
    {
        private delegate void DoMagicDel(BusinessObject bo, string s);

        private DoMagicDel delDoMagic;
        public void DoMagic(string s)
        {
            BusinessObject bo = (BusinessObject)Activator.CreateInstance(Type.GetType("Module1+MyBusinessObject"));
            MethodInfo mi = bo.GetType().GetMethod("DoMagic", BindingFlags.Public | BindingFlags.Instance);
            // ArgumentException: Cannot bind to the target method because its signature or security transparency is not compatible with that of the delegate type.
            delDoMagic = (DoMagicDel)Delegate.CreateDelegate(typeof(DoMagicDel), null, mi);
            delDoMagic(bo, s);
        }
    }
    #endregion
}

其中程序集A具有对程序集B的项目引用，但反之亦然。 当我将第一个参数DoMagicMel更改为MyBusinessObject类型时，它会起作用。但由于程序集B不知道这种类型的程序集A，因此这只适用于我的简化示例：

private delegate void DoMagicDel(MyBusinessObject bo, string s);

有机会让它工作吗

ArgumentException: Cannot bind to the target method because its signature or security transparency is not compatible with that of the delegate type.

为什么下面的Delegate.CreateDelegate会生成运行时

ArgumentException

• 因为

  DoMagicDel

  的签名与mi描述的方法的签名不匹配

有机会让它工作吗

ArgumentException: Cannot bind to the target method because its signature or security transparency is not compatible with that of the delegate type.

• 是，使用

  MakeGenericType

  匹配mi的签名：

  #region Assembly B
  public class MyDataObject
  {
      public delegate void DoMagicDel<T1>(T1 arg1, string arg2);
      private static Delegate delDoMagic;
      public void DoMagic(string s)
      {
          var bo = Activator.CreateInstance("Module1", "Module1.MyBusinessObject").Unwrap();
          MethodInfo mi = bo.GetType().GetMethod("DoMagic", BindingFlags.Public | BindingFlags.Instance);
          var doMagicDelType = typeof(DoMagicDel<>).MakeGenericType(bo.GetType());            
          if (delDoMagic == null)
              delDoMagic = Delegate.CreateDelegate(doMagicDelType, null, mi);
          delDoMagic.DynamicInvoke(bo, s);
      }
  }
  #endregion
  

  #区域组件B
  公共类MyDataObject
  {
  公共委托void DoMagicDel（T1 arg1，字符串arg2）；
  私有静态委托delDoMagic；
  public void DoMagic（字符串s）
  {
  var bo=Activator.CreateInstance（“Module1”、“Module1.MyBusinessObject”）.Unwrap（）；
  MethodInfo mi=bo.GetType（）.GetMethod（“DoMagic”，BindingFlags.Public | BindingFlags.Instance）；
  var doMagicDelType=typeof（DoMagicDel）.MakeGenericType（bo.GetType（））；
  if（delDoMagic==null）
  delDoMagic=Delegate.CreateDelegate（doMagicDelType，null，mi）；
  动力三角帆蚌（bo，s）；
  }
  }
  #端区
  

我希望我不会太晚