添加项目文件。

Fluent.Ribbon/Fluent.Ribbon.Showcase/Helpers/TemplateCollection.cs

@@ -0,0 +1,10 @@
+namespace FluentTest.Helpers
+{
+    using System.Collections.Generic;
+    using System.Windows;
+
+    /// <summary> Holds a collection of <see cref="DataTemplate"/> items for application as a control's DataTemplate. </summary>
+    public class TemplateCollection : List<DataTemplate>
+    {
+    }
+}