Demo SpaceEngineers script showing use of ElapsedTime while accounting for various edge cases

ElapsedTime2.cs

TimeSpan LastElapsedTime;

void Main(string argument)
{
    if (ElapsedTime.TotalSeconds == 0)
    {
        // First run. The script has just been created/compiled, or the game was loaded.
        SetupThings();
    }
    else if (LastElapsedTime == null || ElapsedTime < LastElapsedTime.Add(TimeSpan.FromSeconds(10)))
    {
        // ElapsedTime looks reasonable: either we have nothing to compare it to, or it's
        // within 10 seconds of the previous value.
        DoThings();
        LastElapsedTime = ElapsedTime;
    }
    else
    {
        // ElapsedTime is weird. Maybe we've unpaused?
        LastElapsedTime = ElapsedTime;
    }
}