List<匿名类> 访问属性

using System.Reflection;
using System.ComponentModel;

List<object> listZy = new List<object>();

 var zyitem = new
                            {
                                xi = xi,
                                zy = zy,
                                unitid = "",
                                unitname = ""
                            };
                            listZy.Add(zyitem);

 bool ishave=false;
                        foreach (var item in listZy)
                        {
                            PropertyDescriptorCollection pdc = TypeDescriptor.GetProperties(item);
                            PropertyDescriptor pdID = pdc.Find("xi", true);
                            var x = pdID.GetValue(item);
                            
                            PropertyDescriptor pdName = pdc.Find("zy", true);
                            var z = pdName.GetValue(item);

                            if (x.ToString() == xi && z.ToString() == zy)
                            {
                                ishave = true;
                                break;
                            }
                        }