TFS select work items for project

Yesterday, I needed to connect to get all work items for project in Team Foundation 

Server. I have seen couple guides, but not easy to find.  

Here is how to get WorkItems Collection: 

This is example code and is not fit to be implemented as it is. 

protected WorkItemCollection ConnectToTFS()
{

 WorkItemCollection workItemCollection = null; 

 try
 {

  // lets define location of tfs server

  var tfsServerUri = new Uri("http://localhost:8080/tfs");
 
  // Account definition
  // var password = "password";
  // var domain = "domain";
  // var userName = "user";
  var projectName ="TfsQueryProject";
  Project project = null;  
 

  // needed if you access tfs as user
  // NetworkCredential account = new NetworkCredential(userName, password,domain)

  // TeamFoundationServer server = new TeamFoundationServer(tfsServerUri , account);

  TeamFoundationServer server = new TeamFoundationServer(tfsServerUri );

  // make sure you can
  server.Authenticate();

  // Get access to work items collection for server.

  WorkItemStore store = new WorkItemStore(server); 

  // get existing project 

  project = store.Projects[projectName]; 

  if (project == null)
   throw new Exception("Project could not found"); 

  // now construct query for work items that are in project 

  string querySql = "SELECT [System.Id], [System.Title], [System.Description] " +
     "FROM WorkItems " +
     "WHERE [System.TeamProject] = '" + PROJECT + "' " +; 

 //Execute query to get collection with have all the workitems from the project specified. 

 workItemCollection = store.Query(querySql); 

 }
 catch (Exception ex)
 { 

   // Todo:  handle exception as required.

throw ex;
 }

return workItemCollection; 

}