DateTime.TryParseExact以看似正确的格式C＃失败

Question

I have the following code in a test project that I'm working on. Trouble is, TryParseExact keeps displaying an error instead of parsing my date correctly and storing in the dParsedDate variable. What am I doing wrong here? I can't see any issues with my format pattern so I'm at a loss here.

string sDateTime = "2015-09-15 09:09:09";
string sPattern = "YYYY-MM-dd HH:mm:ss";
DateTime dParsedDate;
if (!DateTime.TryParseExact(sDateTime, sPattern, System.Globalization.CultureInfo.InvariantCulture, System.Globalization.DateTimeStyles.None, out dParsedDate))
    textBox2.Text = "ERROR";
else
    textBox2.Text = dParsedDate.ToString();

Answer 1

There is no YYYY format string for DateTime . Use lowercase y 's.

string sPattern = "yyyy-MM-dd HH:mm:ss";

Answer 2

As per msdn documentation at DateTime.TryParseExact

DateTime dParsedDate;
if (!DateTime.TryParseExact(sDateTime, "yyyy-MM-dd HH:mm:ss", System.Globalization.CultureInfo.InvariantCulture, System.Globalization.DateTimeStyles.None, out dParsedDate))
textBox2.Text = "ERROR";
else
textBox2.Text = dParsedDate.ToString();