UseDelegate.cs

public class GetProductBySkuHandlerDelegateExample : IRequestHandler<GetProductBySkuRequest, ProductViewModel>
{
    private readonly ProductDelegates.GetProductBySku _getProduct;

    public GetProductBySkuHandlerDelegateExample(ProductDelegates.GetProductBySku getProduct)
    {
        _getProduct = getProduct;
    }

    public async Task<ProductViewModel> Handle(GetProductBySkuRequest request, CancellationToken cancellationToken)
    {
        var product = await _getProduct(request.Sku);
        return product.ToViewModel();
    }
}