copy array to List

[John Grandy]

What is the most performant way to copy an array's elements into a List ?

[Mark Rae]

"John Grandy" <johnagrandy-at-gmail-dot-comwrote in message
news:OE**************@TK2MSFTNGP04.phx.gbl...

What is the most performant way to copy an array's elements into a List ?

string[] astrTest = new string[5];

astrTest[0] = "One";

astrTest[1] = "One";

astrTest[2] = "One";

astrTest[3] = "One";

astrTest[4] = "One";

List<stringlstTest = new List<string>(astrTest);

[Chris Mullins [MVP]]

"John Grandy" <johnagrandy-at-gmail-dot-comwrote:

What is the most performant way to copy an array's elements into a List ?

I always use the .AddRange() method on List<T>. I've never profiled it to
see if there's a faster way, but I would think not.

Certainly, this is the best method in terms of Code Clarity and Maintenance,
which are generally way more important than the actual performance.

--
Chris Mullins, MCSD.NET, MCPD:Enterprise, MVP C#
http://www.coversant.net/blogs/cmullins

[Chris Mullins [MVP]]

"Chris Mullins [MVP]" <cm******@yahoo.comwrote

"John Grandy" <johnagrandy-at-gmail-dot-comwrote:

>What is the most performant way to copy an array's elements into a List ?

I always use the .AddRange() method on List<T>. I've never profiled it to
see if there's a faster way, but I would think not.

Certainly, this is the best method in terms of Code Clarity and
Maintenance, which are generally way more important than the actual
performance.

I should add that, if it's practical, you should allocate your List<Twith
the correct capacity.

This means if you have a populated array myArray, you should:

List<stringmyList = new List<string>(myArray.Length);
myList.AddRange(myArray);

Doing this will avoid all sorts of unnecessary memory allocations and array
resizes.

--
Chris Mullins, MCSD.NET, MCPD:Enterprise, MVP C#
http://www.coversant.net/blogs/cmullins