Convert array of strings to List<string>

c# c#-2.0
Nick Rolando picture Nick Rolando · Apr 12, 2012 · Viewed 251.9k times · Source

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?

Answer

Dmytro Shevchenko picture Dmytro Shevchenko · Apr 12, 2012

Just use this constructor of List<T>. It accepts any IEnumerable<T> as an argument.

string[] arr = ...
List<string> list = new List<string>(arr);

Related questions

Changing the row height of a datagridview

How can I change the row height of a DataGridView? i set the value for the property but height doesnt changed,anyother property has to be checked before set this one

Read More
How to use LogonUser properly to impersonate domain user from workgroup client

ASP.NET: Impersonate against a domain on VMWare This question is what I am asking, but the answer does not provide details on how the _token is derived. It seems to only use WindowsIdentity.GetCurrent().Token so there's no impersonation …

Read More
ExecuteNonQuery requires the command to have a transaction error in my code

I get the following error on cmd.ExecuteNonQuery. "ExecuteNonQuery requires the command to have a transaction when the connection assigned to the command is in a pending local transaction. The Transaction property of the command has not been initialized." Here …

Read More