<PackageReference Include="System.Drawing.Common" Version="8.0.4" />

BitmapSuffixInSameAssemblyAttribute

Specifies that, when interpreting ToolboxBitmapAttribute declarations, the assembly should look for the indicated resources in the same assembly, but with the BitmapSuffix configuration value appended to the declared file name.
namespace System.Drawing { [AttributeUsage(AttributeTargets.Assembly)] public class BitmapSuffixInSameAssemblyAttribute : Attribute { public BitmapSuffixInSameAssemblyAttribute() { throw new PlatformNotSupportedException(System.SR.SystemDrawingCommon_PlatformNotSupported); } } }