Unity3D / C# code to shuffle and array using the Fisher-Yates Shuffle.

ShuffleArray.cs

using UnityEngine;
using System.Collections;


public class ShuffleArray : MonoBehaviour {
	
	// Public so you can fill the array in the inspector
	public int[] scenarios; 
	
	
	void Start () 
	{
		// Shuffle scenarios array
		Shuffle (scenarios);
	}
	
	
	void Shuffle(int[] a)
	{
		// Loops through array
		for (int i = a.Length-1; i > 0; i--)
		{
			// Randomize a number between 0 and i (so that the range decreases each time)
			int rnd = Random.Range(0,i);
			
			// Save the value of the current i, otherwise it'll overright when we swap the values
			int temp = a[i];
			
			// Swap the new and old values
			a[i] = a[rnd];
			a[rnd] = temp;
		}
		
		// Print
		for (int i = 0; i < a.Length; i++)
		{
			Debug.Log (a[i]);
		}
	}
}