In .Net, how do you convert an ArrayList to a strongly typed generic list without using a foreach?

Question

See the code sample below. I need the ArrayList to be a generic List.

ArrayList arrayList = GetArrayListOfInts();  
List<int> intList = new List<int>();  

//Can this be foreach be condensed into one line?  
foreach (int number in arrayList)  
{  
    intList.Add(number);  
}  
return intList;

Answer 1

Try the following

var list = arrayList.Cast<int>().ToList();

This will only work though using the C# 3.5 compiler because it takes advantage of certain extension methods defined in the 3.5 framework.

Answer 2

This is inefficient (it makes an intermediate array unnecessarily) but is concise and will work on .NET 2.0:

List<int> newList = new List<int>(arrayList.ToArray(typeof(int)));