Do not use
DateTime, or
TimeSpan classes, or for that matter any standard CLI time management classes as they do not provide high enough precision.
SFML.NET since the release of 2.1 has had the System module
added, so now the standard SFML
Time and
Clock classes are available. I suggest you download the latest version of SFML.NET from github and also grab a copy of CSFML that includes the blending mode changes. For CSFML you can either compile it yourself or grab a nightly build from
here.
Edit: Forgot this was the DotNet subforum.
That easy to miss eh? xD