I have been working on this for couple hours, searching everywhere can't couldn't find a solution.
I got an error message saying:
アセンブリ 'Microsoft.WindowsAPICodePack, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null' から型 'MS.WindowsAPICodePack.Internal.HResult' を読み込めませんでした。
Which roughly translates into cannot read type blahblahblah.HResult from assembly blahblahblah.
I'm trying to get the thumbnail from a file, using ShellFile.FromFilePath(f.FullName).Thumbnail.ExtraLargeBitmap
The exception is thrown at .Thumbnail.
Any help to get me a transparent thumbnail would do, but I'm really looking for short answers.
This problem is caused by me dragging the dll file directly into the project, apparently that .dll file, for some reason that does not have the class i needed was used instead of the reference. After removing the dll file everything works.