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c#.net-corebitmapsystem.drawing

System.Drawing.Common not working on Windows

I'm trying to run a simple C# Application on windows 11. I'm using the System.Drawing to edit a png file, but this error is occuring.

System.PlatformNotSupportedException: 'System.Drawing.Common is not supported on this platform.'

After a bit of research, turns out System.Drawing is only supported on windows.. but I am using windows.. Perhaps it's because I'm using windows 11?

Furthermore, adding

AppContext.SetSwitch("System.Drawing.EnableUnixSupport", true);

Didn't seem to fix this issue either

The error is thrown on this line of code:

Bitmap bmp = new Bitmap(Bitmap.FromFile(file));
Solution

  • You must build your project for windows. You do this by adding -windows to your current Target Framework Moniker (TFM) in the project file:

      <PropertyGroup>
    <OutputType>WinExe</OutputType>
    <TargetFramework>net7.0-windows</TargetFramework>
    ...
  </PropertyGroup>

    This tells the compiler that you will be running your application exclusively on windows.

    If you are using winforms, also add

        <UseWindowsForms>true</UseWindowsForms>