您可以尝试以下代码:

You can try the below Code:

IList<ResponseDTO> List1 = new List<ResponseDTO>();
ResponseDTO obj = (ResponseDTO)from listObject in List1
                         where listObject.Code == "1001"
                         select listObject;

可以使用您的对象来代替ResponseDTO.

希望对您有所帮助.

Instead of ResponseDTO you can use your object.

Hope this helps.

或者，如果您更喜欢扩展方法语法:

Or if you prefer the extension method syntax:

var matching = list1.Where(o => o.code == "1001");

如果您最多知道一个并且想要获取它，那么:

If you know there''s at most one and you want to get it then:

MyObjectType matching = list1.Where(o => o.code == "1001").FirstOrDefault();

如果不存在匹配项，则FirstOrDefault返回null；如果您要求存在匹配项，则使用First()，如果没有匹配项，则抛出异常.

所有这些扩展方法都在IEnumerable< T>上，因此List< MyObjectType>会在列表中显示.会没事的.它们在System.Linq中.

FirstOrDefault returns null if there are no matches, if you require there to be a match then use First() which throws an exception if there are no matches.

All these extension methods are on IEnumerable<T>, so a List<MyObjectType> will be fine. They''re in System.Linq.