使用C＃中的反射从程序集中获取属性值

我检查了这段代码，但是它给出了错误信息！

I checked this code, but it gives an error message!

// load assembly
          System.Reflection.Assembly assembly = System.Reflection.Assembly.LoadFrom(openFileDialog1.FileName);
          var settingsType = assembly.GetTypes();
          foreach (var form in settingsType)
          {
              //var propList = form.GetProperties().Where(p => p.GetCustomAttributes(typeof(Aviation.Library.CS.Libs.TransactionAttribute), true).Length != 0).ToList();
              var propList = form.GetProperties().ToList();

              foreach (PropertyInfo btn in propList)
              {

                  System.Reflection.PropertyInfo defaultProperty = form.GetProperty(btn.Name);
                  object defaultObject = defaultProperty.GetValue(assembly, null);
              }
          }

错误信息是：

对象与目标类型不匹配。

The error message is:
"Object does not match target type."