Replace only the last occurrence of a string within a larger string, using a VB.NET code snippet.

1. Dim NewString As String
2. Dim SourceString As String
3. Dim SearchString As String
4. Dim ReplaceString As String
5. NewString= StrReverse(Replace(StrReverse(SourceString), StrReverse(SearchString), StrReverse(ReplaceStr), , 1))
6. Return (NewString )