Passing a C# DateTime via the Query String

Question

I have a C# DateTime object. This object includes both the date and time. I need to pass this information to a REST-based service. My question is, how do I format the DateTime,

Answer 1

string s = DateTime.ToString("yyyyMMddHHmmssfff")

Note: fff is milliseconds (you may remove the 'fff' if it is not needed)
Then convert it back to DateTime using

DateTime d = DateTime.ParseExact(s, "yyyyMMddHHmmssfff", CultureInfo.InvariantCulture)