public static List <T> GetUnderlyingItemsAsList <T>(System.Collections.ObjectModel.Collection <T> coll, bool throwOnError = true)
{
if (coll == null)
{
return(null);
}
var collType = coll.GetType();
Func <object, object> getFunc;
lock (gCollectionGetUnderlyingListFuncs)
{
if (!gCollectionGetUnderlyingListFuncs.TryGetValue(collType, out getFunc))
{
getFunc = Reflection.Util.GenerateMemberGetter <object>(collType, "items");
gCollectionGetUnderlyingListFuncs.Add(collType, getFunc);
}
}
var items = getFunc(coll);
var list = items as List <T>;
if (list == null && throwOnError)
{
throw new InvalidOperationException(string.Format(KSoft.Util.InvariantCultureInfo,
"Tried to get Collection's underling Items as a List<{0}> but it is a {1}",
typeof(T), items?.GetType()));
}
return(list);
}
