LINQ : make select and update

Question

Hello,

I have this code

foreach (MyType o in myList)
{
    var res = from p in myOriginalList
        where p.PropertyA == o.PropertyA && p.PropertyB == o.PropertyB
        select p;

    //Need to update myOriginalList

    //....
}

I'd like in the myOriginalList do an update for each record found by the Linq select. How can I do this ?

Thanks,

Answer 1

foreach(var item in res)
{
   item.prop = updatedvalue;
}

Do you mean this?

Answer 2

There is no inbuilt ForEach extension - so just loop and update:

foreach(var item in res) {
    item.SomeProp = someValue;
}

Note also that you can use SelectMany to do this in one query:

var res = from MyType o in myList
          from p in myOriginalList
              where p.PropertyA == o.PropertyA && p.PropertyB == o.PropertyB
              select p;