Convert array of strings to List<string>
I've seen examples of this done using .ToList() on array types, this seems to be available only in .Net 3.5+. I'm working with .NET Framework 2.0 on an ASP.NET project that can't be upgraded at this time, so I was wondering: is there another solution? One that is more elegant than looping through the array and adding each element to this List (which is no problem; I'm just wondering if there is a better solution for learning purposes)?
string[] arr = { "Alpha", "Beta", "Gamma" };
List<string> openItems = new List<string>();
foreach (string arrItem in arr)
{
openItems.Add(arrItem);
}
If I have to do it this way, is there a way to deallocate the lingering array from memory after I copy it into my list?
Just use this constructor of List<T> . It accepts any IEnumerable<T> as an argument.
string[] arr = ...
List<string> list = new List<string>(arr);
From .Net 3.5 you can use LINQ extension method that (sometimes) makes code flow a bit better.
Usage looks like this:
using System.Linq;
// ...
public void My()
{
var myArray = new[] { "abc", "123", "zyx" };
List<string> myList = myArray.ToList();
}
PS. There's also ToArray() method that works in other way.