C # generate a large number of non-repeated random numbers in a short period of time

To generate a random number, you can use the pseudo-random number generator random to generate a pseudo-random number under the control of the seed. By default, the current time value is used as the seed. If ProgramRunning quickly will result in running multiple times at almost the same time, and there will certainly be duplicates. For example, if we want to generate 5 random numbers between 1 and 10, we will often generate 2 2 1 1 1 1 1. So how can we get a random number that is not so repeated? For example, 4 2 3 3 5.

Some people say that thread. Sleep (5) is used, but I don't recommend it because it will slow the system down.

The method I used is: using the seed guid. newguid (). gethashcode (), there will be no large number of duplicates in a short time.