C# - How do I copy alternate elements from one byte array to another

I have a byte array. I need to copy alternate elements 0,2nd,4th ,6th ,8th elements ......and so on from the source byte array to new destination array.

How do I do that in C#?

re: C# - How do I copy alternate elements from one byte array to another

Use a for loop and make it count by 2?
Or use a regular for loop and only take the ones were loopiterator%2==0 ?

re: C# - How do I copy alternate elements from one byte array to another

Thanks for the reply.

I'm doing that. But I'm getting error saying that "{"Value cannot be null.\r\nParameter name: dest"}"

Code snippet:

re: C# - How do I copy alternate elements from one byte array to another

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re: C# - How do I copy alternate elements from one byte array to another

Well, to address your error, you never set your desitnation array to an instance of an array, you leave it at null. You cannot use a null object as an instance.

Secondly however, your loop/copy logic is a bit flawed (which you will see when you are able to step through it)

To get a newarray of the correct size, consider this:
byte[] NewArray = new byte[(oldarray.Length/2)+(oldarray.Length%2)];

if source array had 5 elements (.Length=5) 0 1 2 3 4
You want 0 2 4, which is an array with 3 elements (.Length=3)
oldarray.Length/2 will be 2 and oldarry.Length%2 =1, so 2+1=3, the number of elements you need.

re: C# - How do I copy alternate elements from one byte array to another

Thanks very much. Got it!