??LINQ??1??

Question

????????????????????????????????????????????????????????????????????????????????????????????????????????

????ToList????????????????????????????????????????????

List<Class1>.Except(List<Class2> I need to map class2 list to class1 list)

???

Answer 1

In LINQ, Select is synonymous with "map" in other languages. It is called "select" because the word comes from database terminology... but Select is what you want:

var mappedTypes = myCollection.Select(item => new MappedType(item.Something));

Answer 2

If you want a projection you can use ye olde Select operator:

list1.Except(list2.Select(x => ConvertToClass1(x));

Answer 3

List<Class1>.Except(List<Class2>.Select(e => 
                                           new Class1() 
                                                    { 
                                                      Field1 = e.Field1 ...
                                                    });

However, I would advise you to use automapper.