I want to take a string from a textbox (txtFrom) and save the first word and save whatever is left in another part. (the whatever is left is everything past the first space)
There is an overload of the String.Split() method which takes an integer representing the number of substrings to return.
So your method call would become: string[] array = txtFrom.Text.Split(' ', 2);
string[] array = txtFrom.Text.Split(' ', 2);