public static void Reset <T> (this ICollection <T> self, IEnumerable <T> newContents)
{
if (self == null)
{
throw new ArgumentNullException(nameof(self));
}
if (newContents == null)
{
throw new ArgumentNullException(nameof(newContents));
}
if (self is ObservableCollectionEx <T> oce)
{
oce.Reset(newContents);
}
else
{
self.Clear();
self.AddItems(newContents);
}
}
/// <summary> /// Adds the given new collection to a collection and returns the collection. /// </summary> /// <remarks> /// To be used as a preferred form to traditional collection Add when chaining is necessary or when updating an EF object tree. /// FOR EF: Usage of this method ensures object trees are populated in the correct order for persistence of IDs. /// </remarks> /// <typeparam name="T">The type of the object.</typeparam> /// <param name="this">The collection property for the collection to add to.</param> /// <param name="newObjects">The new object to add.</param> /// <returns>The collection.</returns> public static ICollection <T> AddItems <T>(this ICollection <T> @this, IEnumerable <T> newObjects) => @this.AddItems(newObjects.ToArray());
