Find Execution time of a Method

Question

I am making an Image Steganography project for my college. I have finished the project and have kept several different algorithms for hiding data in images.

What I want

Answer 1

This is a useful extension method for Stopwatch:

public static class StopwatchExt
{
    public static string GetTimeString(this Stopwatch stopwatch, int numberofDigits = 1)
    {
        double time = stopwatch.ElapsedTicks / (double)Stopwatch.Frequency;
        if (time > 1)
            return Math.Round(time, numberofDigits) + " s";
        if (time > 1e-3)
            return Math.Round(1e3 * time, numberofDigits) + " ms";
        if (time > 1e-6)
            return Math.Round(1e6 * time, numberofDigits) + " µs";
        if (time > 1e-9)
            return Math.Round(1e9 * time, numberofDigits) + " ns";
        return stopwatch.ElapsedTicks + " ticks";
    }
}

Use it like this:

Stopwatch stopwatch = Stopwatch.StartNew();
//Call your method here
stopwatch.Stop();
Console.WriteLine(stopwatch.GetTimeString());