observableCollectionExtensions.md

Extensions

ObservableCollectionExtensions

RemoveAll(match)

RemoveAll(Predicate match)

Removes all the elements that match the conditions defined by the specified predicate.

• Returns the number of elements removed from the ObservableCollection<T>.
• Exception match is null.

var collection = new ObservableCollection<int> { 1, 2, 3, 4, 5 };
var removed = collection.RemoveAll(x => x % 2 == 0); // 2 // { 1, 3, 5 }

RemoveAll(match,action)

RemoveAll()

Removes all the elements that match the conditions defined by the specified predicate, and execute the specified action on each element removed.

• Returns the number of elements removed from the ObservableCollection<T>.
• Exception match is null or action is null.

var collection = new ObservableCollection<int> { 1, 2, 3, 4, 5 };
var removed = collection.RemoveAll(x => x % 2 == 0, x => Console.WriteLine("Delete: " + x));
// Delete: 2
// Delete: 4