Removed support for legacy .Net Framework. Lowest supported versions are now netstandard2.0 and .Net 4.6.2.
All use of System.Drawing has been removed. In 2.5, only Net 6.0 avoided System.Drawing.
Linux installations no longer need to ensure libgdiplus is installed as it is no longer used.
Changed from using EscapeUriString to EscapeDataString to encode the "account title" as the former is obsolete in .Net 6. This changes the value in the generated data string from [email protected] to a%40b.com. We have tested this with Google Authenticator, Lastpass Authenticator and Microsoft Authenticator. All three of them handle it correctly and all three recognise that it is still the same account so this should be safe in most cases.
2.5.0
Now runs on .Net 6.0.
Technically the QR Coder library we rely on still does not fully support .Net 6.0 so it is possible there will be other niggling issues, but for now all tests pass for .Net 6.0 on both Windows and Linux.
Common Pitfalls
Old documentation indicated specifying width and height for the QR code, but changes in QR generation now uses pixels per module (QR "pixel") so using a value too high will result in a huge image that can overrun memory allocations
Don't use the secret key and ManualEntryKey interchangeably. ManualEntryKey is used to enter into the authenticator app when scanning a QR code is impossible and is derived from the secret key (discussion example)
With versions prior to 3.0 only, on linux, you need to ensure libgdiplus is installed if you want to generate QR Codes. See codebude/QRCoder#227.
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