The type name 'Bitmap' could not be found in the namespace 'System.Drawing'.

[mgungorchamp]

Error CS1069 The type name 'Bitmap' could not be found in the namespace 'System.Drawing'. This type has been forwarded to assembly 'System.Drawing.Common, Version=0.0.0.0, Culture=neutral,

InfoBoard (net7.0-android), InfoBoard (net7.0-ios), InfoBoard (net7.0-maccatalyst)

The name 'QrCodeImage' does not exist in the current context

(net7.0-android), InfoBoard (net7.0-ios), InfoBoard (net7.0-maccatalyst), InfoBoard (net7.0-windows10.0.19041.0)

[devtram]

The issue is mainly you have updated your app to a latest framework e.g. net6.0 or 7.0. And this System.Drawing is not supported in non-windows platforms. This library is not recommended now, Microsoft recommends to use a newer library that belongs to ".NET Multi-platform App UI" Microsoft.Maui.Graphics and other. More information here...

I would request the developer of this Nuget library to upgrade their code libraries to the recommended ones for better compatibility for future.

[codebude]

Perfectly explained @devtram, thanks! @mgungorchamp you can use one of the other rendering classes that are supported on non-Windows platforms (e.g. PngByteQRCode). You can find a full compatability matrix in our wiki: https://github.com/codebude/QRCoder/wiki/Advanced-usage---QR-Code-renderers#2-overview-of-the-different-renderers

Long-term, with QRCoder "2.0" we plan to move away from System.Drawing.