using System;using System.Collections.Generic;using System.Linq;using System.Reflection;using System.Text;namespace U1City.Infrastructure{    public class EntityExtension    {        public static T EntityToEntityByField
     
      (object obj, T newObj) where T : class,new()        {            if (newObj == null)            {                newObj = new T();            }            PropertyInfo[] propertyInfos = obj.GetType().GetProperties();            PropertyInfo[] newPropertyInfos = typeof(T).GetProperties();            foreach (var newPropertyInfoItem in newPropertyInfos)            {                foreach (var propertyInfoItem in propertyInfos)                {                    if (                      propertyInfoItem.PropertyType.FullName.Equals(newPropertyInfoItem.PropertyType.FullName)                      && propertyInfoItem.Name == newPropertyInfoItem.Name                      && propertyInfoItem.CanRead                      && newPropertyInfoItem.CanWrite                      )                    {                        newPropertyInfoItem.SetValue(newObj, propertyInfoItem.GetValue(obj, null), null);                        break;                    }                    else if (                        propertyInfoItem.Name == newPropertyInfoItem.Name                        && !propertyInfoItem.PropertyType.FullName.Equals(newPropertyInfoItem.PropertyType.FullName))                    {                      //??  EntityToEntityByField(propertyInfoItem.GetValue(obj, null), newPropertyInfoItem.GetValue(newObj, null));                    }                }            }            return newObj;        }    }}