System.Runtime.InteropServices.ExternalException occurs while displaying base64string in WinForms application

### Problem description:

We had previously raised the same query, which is mentioned below. ​

**Query link:** https://github.com/dotnet/runtime/issues/61997
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We are using .NET 9.0, but we are still facing this exception. The main window appears as expected; however, it displays an empty window. Additionally, the exception appears in the Output window. Please refer to the image below for reference.

**Sample Zip:** [WinFormsApp.zip](https://github.com/user-attachments/files/30177053/WinFormsApp.zip)

**Image reference:**

**System Specification:**

Start by running the attached WinFormsApp.zip on .NET 9 and compare the behavior with issue 61997. Use the empty window and Output-window exception as the initial reproduction signals. Done requires a confirmed reproduction and a clearly identified runtime or application cause, with any resulting fix or regression coverage documented.

Written by the indexing model from the issue text.