docs-sidebar.html

<ul class="docs-sidebar__list">
    <li><a href="/">Documentation Home</a></li>

    {% for section in site.top_level_sections %}
        {% if page.section == section %}
            {% assign sectionClass = "expanded" %}
        {% else %}
            {% assign sectionClass = "collapsed" %}
        {% endif %}

        {% if section == "Introduction" %}
            {% assign sectionClass = "expanded" %}
        {% endif %}

        <li>
            <span onclick="$(this).toggleClass('expanded collapsed');" class="docs-sidebar__heading {{ sectionClass }}">{{ section }}</span>
            <ul>
            {% if page.section == ".NET API" %}
                {% assign viewing_server_version = site.latest_versions.server %}
                {% assign viewing_dotnet_version = page.version %}
            {% else %}
                {% if page.version %}
                    {% assign viewing_server_version = page.version %}
                {% else %}
                    {% assign viewing_server_version = site.latest_versions.server %}
                {% endif %}
                {% assign viewing_dotnet_version = site.latest_versions.dotnet-api %}
            {% endif %}

            {% assign pages = site.pages | where:"section",section | where:"exclude_from_sidebar", false %}
            
            {% assign pinnedItems = pages| where:"pinned", true | sort: "title" %}
            {% assign normalItems = pages | where:"pinned", false | sort: "title"  %}

            {% for item in pinnedItems %}
                {% if item.section == ".NET API" and item.version == viewing_dotnet_version %}
                    <li>
                        <a href="{{ item.url }}">{{ item.title }}</a>
                    </li>
                {% elsif item.section != ".NET API" and item.version == viewing_server_version %}
                    <li>
                        <a href="{{ item.url }}">{{ item.title }}</a>
                    </li>
                {% endif %}
            {% endfor %}
            {% for item in normalItems %}
                {% if item.section == ".NET API" and item.version == viewing_dotnet_version %}
                    <li>
                        <a href="{{ item.url }}">{{ item.title }}</a>
                    </li>
                {% elsif item.section != ".NET API" and item.version == viewing_server_version %}
                    <li>
                        <a href="{{ item.url }}">{{ item.title }}</a>
                    </li>
                {% endif %}
            {% endfor %}
            </ul>
        </li>        
    {% endfor %}
</ul>