LINQ Joys: Part 2

Code:

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                private IEnumerable<TypeInfo> SearchMethodsInLoadedAssemblies(
                        IEnumerable<Assembly> loadedAssemblies, string startText)
                {
                        // Do not modify the following line.

                        startText = startText.ToLower();

                        // Todo:
                        // The SearchMethodsInLoadedAssemblies method of the AssemblyExplorerForm
                        //  class extracts all the public members of each loaded assembly where the
                        //  member's name starts with the startText parameter.
                        // The search is case insensitive. The method returns a strongly typed
                        //  IEnumerable of TypeInfo objects with the TypeName and MemberName
                        //  properties set to the respective properties from the extracted types and
                        //  members.

            return from items in loadedAssemblies
                    where items.GetTypes().SelectMany(item => item.Name.ToLower().StartsWith(startText))
                    select items;
           
                        // Hint:
                        // You can get all the types exposed by an assembly by calling the
                        //  GetTypes method of the Assembly class.

                        // Hint:
                        // You can call SelectMany several times with different overloads and parameters
                        //  to drill down through the types and members.
                }

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3.5, 2008.

I read the msdn library item (http://msdn.microsoft.com/en-us/library/bb534336.aspx) about using selectmany and followed their code example almost to the t, yet, it is not compiling, telling me to "Specify the arguments explicity". Help!