public static IEnumerable <Lazy <TExtension, TMetadata> > GetExports <TExtension, TMetadata>(this HostServices services)
{
var getExports = getExportsCache.GetOrAdd(Tuple.Create(services.GetType(), typeof(TExtension), typeof(TMetadata)),
_ =>
{
var method = services.GetType()
.GetMethods(BindingFlags.Instance | BindingFlags.Public | BindingFlags.NonPublic)
.Where(m => m.Name.EndsWith("GetExports") &&
m.IsGenericMethodDefinition &&
m.GetGenericArguments().Length == 2)
.FirstOrDefault();
Func <IEnumerable <Lazy <TExtension, TMetadata> > > func;
if (method == null)
{
func = () => Enumerable.Empty <Lazy <TExtension, TMetadata> >();
}
else
{
var generic = method.MakeGenericMethod(typeof(TExtension), typeof(TMetadata));
func = () => (IEnumerable <Lazy <TExtension, TMetadata> >)generic.Invoke(services, null);
}
return(func);
});
return(((Func <IEnumerable <Lazy <TExtension, TMetadata> > >)getExports).Invoke());
}