Send Id .cshtml to .cs page

Question

Hello everyone Please help me.

@model ICollection<CategorySummary>

<h3 id="BlogCategories">Blog Categories</h3>

<ul class="list-group--alt">

@foreach (var category in Model)

{

<li id="@category.CategoryId"><a href="/blog/category/@category.UrlSlug">@category.Title</a></li>

}

</ul>

 How to send li id in .cs file 

particular id .It's very argent Please help me