How is a random number generated at runtime?

Question

Since computers cannot pick random numbers(can they?) how is this random number actually generated. For example in C# we say,

Random.Next()

Answer 1

I don't know much details but what I know is that a seed is used in order to generate the random numbers it is then based on some algorithm that uses that seed that a new number is obtained.

If you get random numbers based on the same seed they will be the same often.