public void TestBrokenRelatedLinks()
        {
            PivotCollection collection = new PivotCollection();
            collection.FacetCategories.Add(new PivotFacetCategory("alpha", PivotFacetType.String));

            PivotItem item = new PivotItem("0", collection);
            item.AddFacetValues("alpha", "alpha");
            item.AddRelatedLink(new PivotLink(null, "http://pauthor.codeplex.com"));
            collection.Items.Add(item);

            item = new PivotItem("1", collection);
            item.AddFacetValues("alpha", "bravo");
            item.AddRelatedLink(new PivotLink("charlie", null));
            collection.Items.Add(item);

            PivotCollectionBuffer buffer = new PivotCollectionBuffer(collection);
            String targetPath = Path.Combine(WorkingDirectory, "sample.cxml");
            LocalCxmlCollectionTarget target = new LocalCxmlCollectionTarget(targetPath);
            target.Write(buffer);

            AssertCxmlSchemaValid(targetPath);

            CxmlCollectionSource targetAsSource = new CxmlCollectionSource(targetPath);
            buffer.Write(targetAsSource);

            AssertEqual("Related Link", buffer.Collection.Items[0].RelatedLinks.First().Title);
            AssertEqual("http://pauthor.codeplex.com", buffer.Collection.Items[0].RelatedLinks.First().Url);
            AssertEqual(0, buffer.Collection.Items[1].RelatedLinks.Count());
        }
 /// <summary>
 /// Clears all the cached header data for this collection.
 /// </summary>
 protected void ClearCache()
 {
     m_cachedCollectionData = null;
 }
 /// <summary>
 /// Creates a new collection buffer with an existing collection as its basis.
 /// </summary>
 /// <param name="collection">the collection to serve as the basis for the new buffer</param>
 public PivotCollectionBuffer(PivotCollection collection)
 {
     this.Collection = collection;
 }