Solutions

 You can download the example solutions to see additional details and to experiment with the programs at https://github.com/PacktPublishing/The-Modern-CSharp-Challenge/tree/master/Chapter04.

49. Random doubles

The following NextDouble extension method uses the Random class's existing NextDouble method to generate a double value within a range:

public static class RandomExtensions
{
    // A Random objects shared by all extensions.
    private static Random Rand = new Random();

    // Return a double between minValue and maxValue.
    public static double NextDouble(this Random rand,
        double minValue, double maxValue)
    {
        return minValue + Rand.NextDouble() * (maxValue - minValue);
    }
}

The RandomExtensions class creates a Random object at the class level. That object is static, so it is available to all extension methods defined in this class.

Note

If you create a new Random object without passing its constructor a seed value, the class uses the system's time to...