Share 'Regular expressions'

I'm working with l-systems and would like to know if it is possible to access regular expressions in vb.net components, like in the following example: Dim StringToCheck As String = "EEOOAA" Dim StringToFind As String = "A" Dim exp As New Regex(StringToFind, RegexOptions.IgnoreCase) Dim Occurrences As Integer = exp.Matches(StringToCheck).Count This returns an error that Regex is not defined, but…