You could use the following method to split an array into 2 separate arrays
public void Split<T>(T[] array, int index, out T[] first, out T[] second) {
first = array.Take(index).ToArray();
second = array.Skip(index).ToArray();
}
public void SplitMidPoint<T>(T[] array, out T[] first, out T[] second) {
Split(array, array.Length / 2, out first, out second);
}