ASP.NET GetFileName to return one file only using wildcard


I am looking into return a single file name using wildcard as I have prefix in the file name. How can I do this?

Sameple files (xxxxx_ is the prefix)

Thanks in advance.
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Hi! You may try this one
    private List<string> GetFileNames(string searchPattern, SearchOption searchOption, string directory)
        List<string> fileNames = new List<string>();

        DirectoryInfo di = new DirectoryInfo(directory);

        foreach (FileInfo fi in di.GetFiles(searchPattern, searchOption))

        return fileNames;


List<string> fileNames = GetFileNames("?????_.jpg", SearchOption.AllDirectories, @"C:\");//you may use question mark(?) or asterisk(*) to represent your wildcard character

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webcertifiedAuthor Commented:
This does not return single file string which I am looking for.
Try this code

Dim Files() As String = Directory.GetFiles("path", "12345_*.*")

If Files.Count = 1
   'Textbox1.Text = Files(0)
End If
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