How can I make the first character of a string to be uppercase in C#? [duplicate]

Question

Possible Duplicates:
Capitalizing word in a string
Make first letter upper case

I have a string like this:

var a = "this is a string";

Is there a simple way I can make the first character change to uppercase?

This is a string

Your question is actually answered in another question: Capitalizing word in a string — Gabe
– Gabe, Commented Aug 29, 2011 at 5:19
@Gabe, that's not a dupe since it's the first letter in each word. This question is a dupe however, see Drahakar's link. — paxdiablo
– paxdiablo, Commented Aug 29, 2011 at 5:20
@pax: What I meant is that the question itself has the answer to this question. It's not as good as yours, but better than most of the answers in Drahakar's link. — Gabe
– Gabe, Commented Aug 29, 2011 at 5:22
@Gabe: I don't agree with closing questions because the answer is provided in a different question. That just makes answers harder to find. But I'm not overly fussed in this case: I have no doubt this question will be closed, but because there's a duplicate question. — paxdiablo
– paxdiablo, Commented Aug 29, 2011 at 5:24

paxdiablo · Accepted Answer · 2011-08-29 05:15:14Z

You can use the following code:

if (!String.IsNullOrEmpty(a)) a = Char.ToUpper(a[0]) + a.Substring(1);

If you're sure that the string won't be null or empty, you can drop the if statement as well but I prefer to program defensively.

David Anderson · Accepted Answer · 2011-08-29 05:25:14Z

If you are not worried about the fact that a string is immutable, than you can return a new string instance.

var a = "this is a string"; a = string.Format("{0}{1}", char.ToUpper(a[0]), a.Remove(0, 1));

But, if you are going to end up needing to do more string manipulation on the same value, you may want to consider using a StringBuilder instead.

var a = "this is a string"; StringBuilder builder = new StringBuilder(a); builder.Replace(a[0], char.ToUpper(a[0]), 0, 1);

2 Answers 2