Converting a list of ints to a byte array

Question

I tried to use the List.ConvertAll method and failed. What I am trying to do is convert a List to byte[]

I copped out and went

Answer 1

Since you don't want a byte[][] where each integer maps to an array of four bytes, you cannot call ConvertAll. (ConvertAll cannot perform a one-to-many conversion)

Instead, you need to call the LINQ SelectMany method to flatten each byte array from GetBytes into a single byte[]:

integers.SelectMany(BitConverter.GetBytes).ToArray()