Question

Possible Duplicate:
Random number generator only generating one random number
class System.Random .. why not static?

I have a public static class called RandomGeneratorwhich only has one value a public static random = new Random();

This is what it looks like

    public static class RandomGenerator
    {
        public static Random random = new Random(); 
    }

I had to do this because when my code went to access a random it would generate too many duplicate copies (I believe it had something to do with the location of Random in memory)

The above code works great! My code generates a truly random value each time it’s called. My question is why isn’t random a built in static function of the C# language? Is it because accessing something this way will result in a performance hit? Are there any notable performance issues with the way i’ve written my code?

Answer 1

MSDN writes the following about the Random constructor:

The default seed value is derived from the system clock and has finite
resolution. As a result, different Random objects that are created in
close succession by a call to the default constructor will have
identical default seed values and, therefore, will produce identical
sets of random numbers. This problem can be avoided by using a single
Random object to generate all random numbers. You can also work around
it by modifying the seed value returned by the system clock and then
explicitly providing this new seed value to the Random(Int32)
constructor.

http://msdn.microsoft.com/en-us/library/h343ddh9.aspx