/// <summary>
/// Invokes the properties changed.
/// </summary>
/// <param name="instance">The INotifyPropertyChanged implementation.</param>
/// <param name="invoker">The invoker.</param>
/// <param name="propertyNames">The property name list.</param>
public static void InvokePropertiesChanged(this INotifyPropertyChanged instance, PropertyChangedInvokerEventHandler invoker, params string[] propertyNames)
{
foreach (var propertyName in propertyNames)
{
invoker?.Invoke(propertyName);
}
}
/// <summary>
/// Sets the specified invoker.
/// </summary>
/// <typeparam name="T">.</typeparam>
/// <param name="instance">The instance.</param>
/// <param name="invoker">The invoker.</param>
/// <param name="field">The field.</param>
/// <param name="value">The value.</param>
/// <param name="propertyName">Name of the property.</param>
/// <param name="propertyNames">The other optional property names to notify.</param>
/// <returns> True if old value and new value are different. .</returns>
public static bool Set <T>(this INotifyPropertyChanged instance, PropertyChangedInvokerEventHandler invoker, ref T field, T value, [CallerMemberName] string propertyName = null, params string[] propertyNames)
{
if (EqualityComparer <T> .Default.Equals(field, value))
{
return(false);
}
field = value;
invoker?.Invoke(propertyName);
return(true);
}