c＃更新列表中的项目

Question

I have the following:

public class Item
{
   public Item()
   {

   }

   public string Name {get; set;}
}


public static class Extension
{
    public static Item Modify(this Item itm)
    {
        itm.Name = "Changed";

        return itm;
    }
}

and then in my code I instantiate a List<Item> and add 10 items to it.

List<Item> items = new List<Item>();  // contains 10 items
.....

If now I want to iterate my list and for each item I call the extension method and modify it's name property, how do I update the item in items list?

foreach (Item itm in items)
{
    Item changedItem = itm.Modify();
    // update item in items list
}

Answer 1

Since your method returns the same item that it modifies, your foreach loop already does what you want.

You could produce a new list and reassign items for a somewhat shorter code:

items = items.Select(Modify).ToList();