VB.NET help slicing a substring : Trying to slice a sub-string out of a string and though I have searched the site, I have found methods of both searching for a sub-string, and slicing a string but only for the first instance of the slice bound. Bellow is what I am trying to do:

string = "abcdabcdabcdabcd"
I want to cut out each of the b's using the bounds a and c to identify them. 

I am new to posting on the forum, though I have read through the site when I have needed help with solutions in the past. I am very rusty at coding, and I was hoping someone could point me in the right direction. Thanks.
