Hi Mehrdad

How are you trying to add / access the stylesheet can you share an example? What kind of plugin are you making?

Adding the stylesheet using a package.manifest file in your package folder under /App_Plugins/YourPlugin should be enough to have the stylesheet loaded.

Please see https://our.umbraco.org/documentation/Tutorials/Creating-a-Property-Editor/

As with the javascript injection you can add a CSS file as well by adding

css: [
    '~/App_Plugins/YourPluginFolder/your.css'
]

So if we use the example referenced that would look like this

{
    //you can define multiple editors
    propertyEditors: [
        {
            /*this must be a unique alias*/
            alias: "My.MarkdownEditor",
            /*the name*/
            name: "My markdown editor",
            /*the icon*/
            icon: "icon-code",
            /*grouping for "Select editor" dialog*/
            group: "Rich Content",
            /*the HTML file we will load for the editor*/
            editor: {
                view: "~/App_Plugins/MarkDownEditor/markdowneditor.html"
            }
        }
    ]
    ,
    //array of files we want to inject into the application on app_start
    javascript: [
        '~/App_Plugins/MarkDownEditor/markdowneditor.controller.js'
    ],
    css: [
        '~/App_Plugins/YourPluginFolder/your.css'
    ]
}

But since I don't know what kind of plugin you're making and how you're making it you maybe don't need to setup the entire manifest but can perhaps simply just have this in your package.manifest file

{
   css: [
       '~/App_Plugins/YourPluginName/css/yourpluginname.css'
   ]
}

So in the /App_Plugins you should place a folder with the name of your plugin and inside it place a package.manifest file with the CSS reference and you should then also place the referenced css file in this folder too.

I hope this makes sense :)

/Jan

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