How do I copy items from list to list without foreach?

You could try this:

List<Int32> copy = new List<Int32>(original);

or if you're using C# 3 and .NET 3.5, with Linq, you can do this:

List<Int32> copy = original.ToList();

I see that this answer is still getting upvotes. Well, here's a secret for ya: the above answer is still using a foreach. Please don't upvote this any further.

To add the contents of one list to another list which already exists, you can use:

targetList.AddRange(sourceList);

If you're just wanting to create a new copy of the list, see the top answer.

Easy to map different set of list by linq without for loop

var List1= new List<Entities1>();

var List2= new List<Entities2>();

var List2 = List1.Select(p => new Entities2
        {
            EntityCode = p.EntityCode,
            EntityId = p.EntityId,
            EntityName = p.EntityName
        }).ToList();

Adding to the top answers, if you want copies of "the objects in the list", then you can use Select and make the copies. (While the other answers make "a copy of a list", this answer makes "a list of copies").

Suppose your item has a Copy method:

List<MyObject> newList = oldList.Select(item => item.Copy()).ToList();

Or that you can create a new object from the previous one with a constructor:

List<MyObject> newList = oldList.Select(item => new MyObject(item)).ToList();   

The result of Select is an IEnumerable<MyObject> that you can also pass to AddRange for instance, if your goal is to add to an existing list.

public static List<string> GetClone(this List<string> source)
{
    return source.Select(item => (string)item.Clone()).ToList();
}