Formatting date in SAP system

You will need to apply new culture to the existing thread as shown below:

Example

DateTime now = DateTime.Now;
Console.WriteLine(now);
CultureInfo sapCulture = new CultureInfo("en-US", true);
sapCulture.DateTimeFormat.ShortDatePattern = "ddMMyyyy";

//sapCulture.DateTimeFormat.FullDateTimePattern =
   sapCulture.DateTimeFormat.ShortDatePattern + " HH-mm-ss";
sapCulture.DateTimeFormat.LongTimePattern = "HH-mm-ss";

//sapCulture.DateTimeFormat.ShortTimePattern = "HH-mm-ss";
System.Threading.Thread.CurrentThread.CurrentCulture = sapCulture;

//System.Threading.Thread.CurrentThread.CurrentUICulture = sapCulture;
Console.WriteLine(now);