Most efficient way to append arrays in C#?
I am pulling data out of an old-school ActiveX in the form of arrays of doubles. I don't initially know the final number of samples I will actually retrieve.
What is the most efficient way to concatenate these arrays together in C# as I pull them out of the system?
You can't append to an actual array - the size of an array is fixed at creation time. Instead, use a List<T> which can grow as it needs to.
Alternatively, keep a list of arrays, and concatenate them all only when you've grabbed everything.
See Eric Lippert's blog post on arrays for more detail and insight than I could realistically provide :)