/// <summary>
/// Tests the observable enumerable methods.
/// </summary>
private static void TestObservableCollection()
{
Console.WriteLine("ObservableCollection Test:");
Console.WriteLine(string.Empty);
var observableCollection = new ObservableCollection <string>();
observableCollection.AddIfNotExists("a");
observableCollection.AddIfNotExists("a");
observableCollection.AddIfNotExists("b");
PrintIEnumerableToConsole(observableCollection, "ObservableCollection");
observableCollection.DeleteIfExists("a");
PrintIEnumerableToConsole(observableCollection, "ObservableCollection");
observableCollection.UpdateValue("b", "c");
PrintIEnumerableToConsole(observableCollection, "ObservableCollection");
observableCollection.DeleteIfExists("c");
PrintIEnumerableToConsole(observableCollection, "ObservableCollection");
Print(observableCollection.AreValuesNull());
var observableCollection1 = new ObservableCollection <string>();
var observableCollection2 = observableCollection1.Clone();
observableCollection2.Add("Abc");
PrintIEnumerableToConsole(observableCollection1, "ObservableCollection");
PrintIEnumerableToConsole(observableCollection2, "ObservableCollection");
}