Have you experienced this same bug with .NET Framework?: Yes
Problem description and Expected behavior:
Note, due to other bug in .net core (3.1.3), RichTextBox Rtf setter always trying to convert input through utf8, and therefor lead to same wrong output.
.NET Core Version: 3.1.3
Have you experienced this same bug with .NET Framework?: Yes
Problem description and Expected behavior: Note, due to other bug in .net core (3.1.3), RichTextBox Rtf setter always trying to convert input through utf8, and therefor lead to same wrong output.
Minimal repro: Same as in https://github.com/dotnet/winforms/issues/3032