使用math.Round代替此Modf / Ceil / Floor组合是否安全？

I'm in the progress of converting some Go code to C# and am wondering if the following piece of code:

_, x := math.Modf(frac)
if x >= 0.5 {
    frac = math.Ceil(frac)
} else {
    frac = math.Floor(frac)
}

would be any different to this:

frac = math.Round(frac)

I know rounding can sometimes be tricky so I wonder if the first snippit acts as a workaround for something.