将通用ObjectResult集合（实体框架数据类型）转换为通用列表集合的更好方法？

Question

考虑下面的程序

public static void Fill<T1, T2>(ObjectResult<T1> Source, List<T2> Destination) 
      where T2 : new() 
     { 
      Destination.AddRange(Source.Select(CreateMapping<T1, T2>())); 
     } 

     public static Func<T1, T2> CreateMapping<T1, T2>() 
     where T2 : new() 
     { 
      var typeOfSource = typeof(T1); 
      var typeOfDestination = typeof(T2); 

      // use reflection to get a list of the properties on the source and destination types 
      var sourceProperties = typeOfSource.GetProperties(); 
      var destinationProperties = typeOfDestination.GetProperties(); 

      // join the source properties with the destination properties based on name 
      var properties = from sourceProperty in sourceProperties 
          join destinationProperty in destinationProperties 
          on sourceProperty.Name equals destinationProperty.Name 
          select new { SourceProperty = sourceProperty, DestinationProperty = destinationProperty }; 

      return (x) => 
      { 
       var y = new T2(); 

       foreach (var property in properties) 
       { 
        var value = property.SourceProperty.GetValue(x, null); 
        property.DestinationProperty.SetValue(y, value, null); 
       } 

       return y; 
      }; 
     } 

当我们接受一个ObjectResult集合（实体框架的数据类型），并返回一个泛型列表。它工作正常，但在某些情况下，它抛出异常为“对象不能枚举两次”...

有没有更好的方法来重写函数？

Answer 1

如果你有ObjectResult的多个列举的问题根本就没有把它传递给你的方法和控制枚举自己：

public static void Fill<T1, T2>(List<T1> Source, List<T2> Destination) 

与

Fill(objectResult.ToList(), destinationList); 

顺便说一句调用它。为什么不用AutoMapper代替？