Quickest way to enumerate the alphabet

Question

I want to iterate over the alphabet like so:

foreach(char c in alphabet)
{
 //do something with letter
}

Is an array of chars the best way

Answer 1

(Assumes ASCII, etc)

for (char c = 'A'; c <= 'Z'; c++)
{
    //do something with letter 
} 

Alternatively, you could split it out to a provider and use an iterator (if you're planning on supporting internationalisation):

public class EnglishAlphabetProvider : IAlphabetProvider
{
    public IEnumerable<char> GetAlphabet()
    {
        for (char c = 'A'; c <= 'Z'; c++)
        {
            yield return c;
        } 
    }
}

IAlphabetProvider provider = new EnglishAlphabetProvider();

foreach (char c in provider.GetAlphabet())
{
    //do something with letter 
} 

Answer 2

var alphabet = Enumerable.Range(0, 26).Select(i => Convert.ToChar('A' + i));

Answer 3

Enumerable.Range(65, 26).Select(a => new { A = (char)(a) }).ToList().ForEach(c => Console.WriteLine(c.A));

Answer 4

I found this:

foreach(char letter in Enumerable.Range(65, 26).ToList().ConvertAll(delegate(int value) { return (char)value; }))
{
//breakpoint here to confirm
}

while randomly reading this blog, and thought it was an interesting way to accomplish the task.

Answer 5

Or you could do,

string alphabet = "abcdefghijklmnopqrstuvwxyz";

foreach(char c in alphabet)
{
 //do something with letter
}

Answer 6

Use Enumerable.Range:

Enumerable.Range('A', ('Z' - 'A' + 1)).Select(i => (char)i)