What's an efficient way to concatenate all strings in an array, separating with a space?

Question

Let's say I have an array of strings:

string[] myStrings = new string[] { "First", "Second", "Third" };

I want to concatenate them so the output is:

First Second Third

I know I can concatenate them like this, but there'll be no space in between:

string output = String.Concat(myStrings.ToArray());

I can obviously do this in a loop, but I was hoping for a better way.

Is there a more succinct way to do what I want?

Andrew Hare · Accepted Answer · 2009-05-12 00:43:35Z

29

Try this:

String output = String.Join(" ", myStrings);

edited May 12, 2009 at 0:43

answered May 12, 2009 at 0:12

Andrew Hare

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Comments

James Black · Accepted Answer · 2009-05-12 00:15:35Z

1

StringBuilder buf = new StringBuilder();
foreach(var s in myStrings)
  buf.Append(s).Append(" ");
var ss = buf.ToString().Trim();

answered May 12, 2009 at 0:15

James Black

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3 Comments

mmcdole Over a year ago

I'd be curious to see the IL code of this and a String.Join(). I'd like to think they are the same.

James Black Over a year ago

I am pretty certain they do something similar.

Damovisa Over a year ago

Yeah, it wouldn't surprise me if they compiled to the same thing. For someone coming across the code later though, String output = String.Join(" ", myStrings); would be easier to understand at a glance.

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