In search of a simpler approach - and something easier on the eyes

How would you re-write the following, so it's a bit easier on the eyes?

Func<DateTime, String> formatter = null;

formatter = new Func<DateTime, String>(d =>
{
    var r = "开发者_如何学编程";

    foreach (var i in new[] { d.Day, d.Month, d.Year })
    {
        if (i < 10) r += "0";

        r += i.ToString();
    }

    return r;
});

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I'd rewrite it as:

Func<DateTime, String> formatter = d => d.ToString("ddMMyyyy", 
    CultureInfo.InvariantCulture);

Only difference here is that for dates before 1000AD, this will pad to 4 digits instead of 2...

EDIT: As noted in comments, this doesn't replicate the bug in the original code - it would format (say) a month of 5 as "055". The simplest way to fix this in the original code would be:

if (i < 10) r += "0";
r += i;

(But I'd prefer my code anyway :)

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I like Jon Skeets answer best, but I'd like to offer an alternative:

Func<DateTime, String> formatter = d => string.Format(
    "{0:00}{1:00}{2:00}", 
    d.Day, d.Month, d.Year);

I always check this site for string formatting: http://blog.stevex.net/string-formatting-in-csharp/

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Any reason not to exchange the entire formatter code with a ToString("ddMMyyyy")?

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Func<DateTime, String> formatter = d => d.ToString("ddMMyyyy");