public class YOUR_CLASS_NAME {

    private readonly IHostingEnvirounment _hostingEnvirounment;

    public YOUR_CLASS_NAME(IHostingEnvironment hostingEnvironment)
    {
        _hostingEnvironment = hostingEnvironment;
    }

    public Image GetImageFromContentRoot(string name) {

        // e.g.: imgPath = "D:\Hosting\ProjectFolder\beep.png"
        var imgPath = Path.Combine(_hostingEnvirounment.ContentRootPath, name);

        return Image.FromFile(imgPath);
    }
}

public Image GetImageFromWebRoot(string name) {

        // e.g.: imgPath = "D:\Hosting\ProjectFolder\wwwroot\beep.png"
        var imgPath = Path.Combine(_hostingEnvirounment.WebRootPath, name);

        return Image.FromFile(imgPath);
    }