Question

I want to generate an array that has 144 number from 1->36 in random order (so each number is repeated 4 times). Can we use Enumerable.Repeat and Enumerable.Range to do that. If yes than please explain to me how?

Answer 1

Well, creating the sequence with all the numbers in is easy:

var items = from x in Enumerable.Range(1, 36)
            from y in Enumerable.Repeat(x, 4)
            select y;

Then you can just use ToArray to get it into an array and shuffle it. There are numerous questions about shuffling an array in C# on SO, such as this one. You could either use that code directly, or call ToArray and shuffle the array in place without yielding it at the end.