I have a list called Students on which there is a workflow running called StudentWorkflow. I want to loop through all list items in Students and retrieve their related W4InstanceId from Workflow Tasks list. How can I do that in C#?

Tried the following but it doesn’t display anything because it doesn’t go inside that second for loop:

using (SPSite site = new SPSite(SPContext.Current.Web.Url))             {                 using (SPWeb web = site.OpenWeb())                 {                     SPList list = web.Lists["Students"];                     foreach (SPListItem item in list.Items)                     {                         foreach (SPWorkflow wf in item.Workflows) //doesn't go inside                         {                             Console.WriteLine(item.ID + " " + wf.InstanceId);                         }                     }                 }             }