今天在公司写代码的时候发生了一个问题；

被调用代码如下：

public static class CatalogComposition
    {
        private static AggregateCatalog catalogs = new AggregateCatalog();

        public static AggregateCatalog AggregateCatalog
        {
            get { return catalogs; }
        }

        public static void ComposeParts<T>(T t)
        {
            CompositionContainer compositionContainer = new CompositionContainer(AggregateCatalog);
            try
            {
                compositionContainer.ComposeParts(t);
            }
            catch (CompositionException ce)
            {
                throw new CompositionException(ce.Message, ce.InnerException);
            }
        }
    }public