Randomly pick 4 elements from an array using c#

Question

I am trying to use random function in C# to randomly pick four from an array addetailsID which has over six elements.

I am placing these randomly picked into an another array strAdDetailsID:

 string[] strAdDetailsID = new string[4];
 for (int i = 0; i < 4; i++)
 {
     Random random = new Random();
     int index = random.Next(0, addetailsID.Length);
     value = addetailsID[index].ToString();
     strAdDetailsID[i] = value;
 }

Sometimes, I get two of the same values from the six elements. How can I get all four unique values to be picked?

Answer 1

You might be better off shuffling the array, and then choosing the first 4 elements.