I'm developing an UWP app via C#, that uses IBasicVideoEffect with IDirect3DSurface. As mentioned in documentation, I have created Windows Runtime Component (Universal Windows) project.
But settings of effects are stored in some implementation of IPropertySet (smth like Dictionary<object, object>).
To use high - level operations on this storage, I've introduced IPropertySetExtensions into runtime component, that has for example Get<T>, GetOrDefault<T> methods, which return instance of T (not object) from storage.
Than I realized, that same operations will be needed in main project, but when I changed
internal static class IPropertySetExtensions into public one, I got an error like "winmd components cant contain generic methods".
That's why I duplicated extension class into main project.
How can I avoid this duplicating? Maybe move shared code into NuGet .dll or smth?
Unfortunately, when writing a WinRT Component there are quite a few limitations due to the fact that WinRT Components are usable in C++, C#, VB and JS (yes also JS). The following document covers part of what to watch out for: https://learn.microsoft.com/en-us/windows/uwp/winrt-components/creating-windows-runtime-components-in-csharp-and-visual-basic
In your case, I think creating a "Class Library (Universal Windows)" will solve that problem since you can write C# code as you like without having to watch out for WinRT Component limitations.