I can\'t find the answer to my specific problem anywhere so I figured I\'d open a new question.
I have a program that converts text between ASCII and Binary. It does thi
You've declared an array, result, but the variable hasn't been assigned an instance of an array, so it's null. You can't add objects to a null array. Perhaps you meant this:
Dim result(BinarySubstrings.Length) As String
If you aren't sure about the size of result, consider using a List(Of String) as mentioned in the comments.