Unity uses random to generate random numbers that are inconsistent with the last time _random

Description

In the use of the system provided by the random random number produced, often will be consistent with the last random number, it is very embarrassing, how to produce a different random number with the last. Very simple (⊙o⊙) Oh ... Code Show:

Using Unityengine;
Using System.Collections;

The public class Random:monobehaviour
{
    ///finally outputs a random number that is different from the last random number
    int getrangenum = 0;
    Random numbers randomly generated each time, used to compare the last to the
    int rangeradomnum = 0;
    Used to calculate the number of each output, easy to observe
    int numcount = 0;
    Use this for initialization
    void Start ()
    {
    }
    //Update are called once per frame
    void Update () c15/>{
        if (input.getmousebuttondown (0))
        {
            numcount++;
            Do
            {
                rangeradomnum = random.range (0, 5);
            }
            while (Getrangenum = = rangeradomnum);
            Getrangenum = Rangeradomnum;

            Debug.Log ("First" + numcount.tostring () + "random number obtained:" + getrangenum);
        }}

The test is as follows: