<PackageReference Include="System.Drawing.Common" Version="9.0.5" />

PrivateFontCollection

public sealed class PrivateFontCollection : FontCollection
Provides a collection of font families built from font files that are provided by the client application.
using System.Runtime.CompilerServices; namespace System.Drawing.Text { public sealed class PrivateFontCollection : FontCollection { public PrivateFontCollection() { throw new PlatformNotSupportedException(System.SR.SystemDrawingCommon_PlatformNotSupported); } [System.Runtime.CompilerServices.NullableContext(1)] public void AddFontFile(string filename) { throw new PlatformNotSupportedException(System.SR.SystemDrawingCommon_PlatformNotSupported); } public void AddMemoryFont(IntPtr memory, int length) { throw new PlatformNotSupportedException(System.SR.SystemDrawingCommon_PlatformNotSupported); } protected override void Dispose(bool disposing) { } } }