How can I use an array item with Interlocked.CompareExchange

Question

I'm familiar with using Interlocked.CompareExchange() with plain objects. However I'd like to use it with the member of an array:

string[] myArray = new string[] { "A", "B", "C" }; 
string myStr = (string) Interlocked.CompareExchange(ref myArray[0], null, myArray[0]); 
// myArray[0] == null

How can I accomplish this?

Answer 1

I am using it like this

string[] myArray = new string[] { "A", "B", "C" };
        string myStr = Interlocked.CompareExchange(ref myArray[0], "F", myArray[0]);
        foreach (var item in myArray)
        {
            Console.WriteLine(item.ToString());
        }

And this is the out put

F B C

Everything is Fine.