GetInvalid-File-Path-NameChars

Question

Hello

I've written this to check if a path name does not include invalid chars which is 2 loop inside each other:

For Each MyChar As Char In AddFolderTextBoxX.Text.Trim
    For Each BadChar As Char In Path.GetInvalidFileNameChars()
        If MyChar = BadChar Then
            MessageBox.Show("bad!!!"
            Exit Sub
        End If
    Next
Next

Can this be improved in any way to prevent inner loops? Or this is just fine?

Also which one is preferred?

If MyChar = BadChar Then...
or
If String.Equals(MyChar, BadChar, StringComparison.OrdinalIgnoreCase) = True Then

Thanks :)

Answer 1

I think this is fine

If AddFolderTextBoxX.Text.Trim().IndexOfAny(Path.GetInvalidFileNameChars()) > -1 Then
    MessageBox.Show("bad!!!")
End If