random string generation - two generated one after another give same results

Question

I have a simple piece of code:

public string GenerateRandomString()
        {
            string randomString = string.Empty;
            Random r = new Rand         


        

Answer 1

It's because you're creating two random objects at the same time. This is giving it the same seed, so you're going to get the same numbers.

When you debug it, there's time between the creation of the random objects which allow them to get different seeds.