Converting 8 digit number to DateTime Type

Use DateTime.ParseExact() with a format specifier of "ddMMyyyy" or "MMddyyyy".

CultureInfo provider = CultureInfo.InvariantCulture;
string dateString = "08082010";
string format = "MMddyyyy";
DateTime result = DateTime.ParseExact(dateString, format, provider);

This will work.

I was just trying to do the same thing, and I'd have to agree with Ignacio's approach. The answer that was accepted works but the ParseExact method throws an exception in the event that the date string is invalid, while the TryParseExact method will just return false. Example:

using System.Globalization;
// ...
string dateString = "12212010";
string format = "MMddyyyy";
DateTime dateStarted;
if (!DateTime.TryParseExact(dateString, format, null, DateTimeStyles.None, out dateStarted))
    dateStarted = DateTime.Now;