Unable to add fontawesome css to payment plugin

I want to add font-awesome.min.css to Nop.Plugin.Payments.CheckMoneyOrder. So I did:

In Nop.Plugin.Payments.CheckMoneyOrder plugin project, under Views\PaymentInfo.cshtml, I added the file like below.
After that I built and gave a it a run. The css file is not loaded even though the code is executed when I debugged. What am I missing?

By the way I'm using Pavilion theme.

PaymentInfo.cshtml:

@{
    Layout = "";
    Html.AddCssFileParts("~/Plugins/Payments.CheckMoneyOrder/Content/font-awesome.min.css");
}

@using Nop.Web.Framework.UI
@model Nop.Plugin.Payments.CheckMoneyOrder.Models.PaymentInfoModel
<table width="100%" cellpadding="0" cellspacing="0">
    <tr>
        <td>
            @Html.Raw(Model.DescriptionText)
        </td>
    </tr>
</table>

Best practices of folder structure is:

- Nop.Plugin.Payments.CheckMoneyOrder
  -Content
   -fontawesome
     -font-awesome.min.css
   -fonts

If you're following same structure, then path should be

Html.AddCssFileParts("~/Plugins/Payments.CheckMoneyOrder/Content/fontawesome/font-awesome.min.css");

I'm not sure about Pavilion theme! please check without it also!

make sure the Content/font-awesome.min.css file exists in the content folder
in your project  
click on the file  -> properties
Copy to output directory: Copy if newer

then build and check if the file exists in your plugin folder

I already tried that.

When I verified the url below, it's there. However it's no where in the html when it's rendered.
https://storeurl/plugins/payments.checkmoneyorder/content/css/font-awesome.min.css

I tried at my end as described above, and it's just working fine!
[email protected] wrote:

Can you please check the status of that css file in console!

It's not loaded but the url pointing to the css file is working. So what actually happened is in 3.9 we have to load the method @Html.NopCssFiles(this.Url, ResourceLocation.Head) after you add the css file or else it won't be added. Another way is to add the file into _Root.Head.cshtml if it's being used throughout the application.