.NET Fiddle

CSharp · Console

/Program.cs

using System;
using System.Globalization;
					
public class Program
{
	public static void Main()
	{
		Console.WriteLine("Hello World");
		string s = "20.09.2015 10.16.12";
        DateTime d;
        bool isValid = DateTime.TryParseExact(s, "dd.MM.yyyy HH.mm.ss", CultureInfo.InvariantCulture, DateTimeStyles.None, out d);
	    
		Console.WriteLine(isValid.ToString());
		
		Console.WriteLine(d.ToString());
	}
}
;