Engineering notation in C#?

Question

Is there any code out there (or a built-in function) which allows outputting a floating point number in engineering notation?

For example, 1.5e-4 would

Answer 1

Here is another version that handles negative and without rounding

public static string ToEngineering(this double value)
{
    var absValue = Math.Abs(value);
    var exp = absValue < 0.001 ? 0 : (int)(Math.Floor(Math.Log10(absValue) / 3.0) * 3.0);
    var newValue = value * Math.Pow(10.0, -exp);
    return $"{newValue}e{exp}";
}