Using @Html.Partial

Using @Html.Partial

I need to add the same menu on different pages and I tired to use
@Html.Partial
I created the partial view _ProjectMenu.cshtml
<ul class="sub-menu">
<li>@Html.ActionLink(Resources.Global.Home_Menu_Project_AssociationManagement,
"AssociationManagement", "Projects")</li>
<li>@Html.ActionLink(Resources.Global.Home_Menu_Project_WarehouseAndInventory,
"WarehouseAndInventory", "Projects")</li>
<li>@Html.ActionLink(Resources.Global.Home_Menu_Project_ElectronicDocumentManagement,
"ElectronicDocumentManagement", "Projects")</li>
<li>@Html.ActionLink(Resources.Global.Home_Menu_Project_Medicine,
"Medicine", "Projects")</li>
<li>@Html.ActionLink(Resources.Global.Home_Menu_Project_BankingSector,
"BankingSector", "Projects")</li>
<li>@Html.ActionLink(Resources.Global.Home_Menu_Project_Insurance,
"Insurance", "Projects")</li>
<li>@Html.ActionLink(Resources.Global.Home_Menu_Project_Websites,
"Websites", "Projects")</li>
<li>@Html.ActionLink(Resources.Global.Home_Menu_Project_WebApplication,
"WebApplication", "Projects")</li>
<li>@Html.ActionLink(Resources.Global.Home_Menu_Project_DataWarehouse,
"DataWarehouse", "Projects")</li>
<li>@Html.ActionLink(Resources.Global.Home_Menu_Project_MobileApplications,
"MobileApplications", "Projects")</li>
<li>@Html.ActionLink(Resources.Global.Home_Menu_Project_TrafficManagement,
"TrafficManagement", "Projects")</li>
<li>@Html.ActionLink(Resources.Global.Home_Menu_Project_LearningSystems,
"LearningSystems", "Projects")</li>
<li
class="sector">@Html.ActionLink(Resources.Global.Home_Menu_Project_Sector,
"Sector", "Projects")</li>
and then I added this code on my page
<div class="span4">
@Html.Partial("_ProjectMenu")
</div>
but I doesn't work.
I guess I need to add some code in controller, but I don't know how to do it?