Convert 20121004 (yyyyMMdd) to a valid date time?

Question

I have a string in the following format yyyyMMdd and I am trying to get it to look like this:

yyyy-MM-dd

When I try:

Answer 1

Here is an extension method I use.

/// 

/// Converts a string to a dateTime with the given format and kind.
/// 
/// The date time string.
/// The date time format.
/// Kind of the date time.
/// 
public static DateTime ToDateTime(this string dateTimeString, string dateTimeFormat, DateTimeKind dateTimeKind)
{
    if (string.IsNullOrEmpty(dateTimeString))
    {
        return DateTime.MinValue;
    }

    DateTime dateTime;
    try
    {
        dateTime = DateTime.SpecifyKind(DateTime.ParseExact(dateTimeString, dateTimeFormat, CultureInfo.InvariantCulture), dateTimeKind);
    }
    catch (FormatException)
    {
        dateTime = DateTime.MinValue;
    }

    return dateTime;
}