How do I join these 3 arrays together to attach it to email activity?

Hi all,

I am currently trying to attach these files in to send outlook mail activity using the AttachmentsCollection instead of just Attachments.
image

How would I go about to get all these files to be attached via AttachmentsCollection? Thanks.

Regards

like this

arrayA.Union(arrayB).ToArray().Union(arrayC).ToArray()
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HI,

How about the following?

arrFiles1.Concat(arrFiles2).Concat(arrFiles3)

Regards,

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