Get only numbers from string

Question

i want to get only numbers from string.

Lest say that this is my string :

324ghgj123

i want to get:

324123

Answer 1

Function that returns string without digits

Public Function _RemoveNonDigitCharacters(S As String) As String
        Return New String(S.Where(Function(x As Char) System.Char.IsDigit(x)).ToArray)
End Function