/// <summary>
/// Sets the property value if the value is different fromt he existing value.
/// The PropertyChanging and PropertyChanged events are raised if the value is updated.
/// </summary>
/// <typeparam name="T">The type of the property</typeparam>
/// <param name="changedHandler">The handler for the PropertyChanged event.</param>
/// <param name="changingHandler">The handler for the PropertyChanging event.</param>
/// <param name="newValue">The new value.</param>
/// <param name="oldValueExpression">The old value expression.</param>
/// <param name="setter">The setter delegate.</param>
/// <returns>The new value.</returns>
public static T SetValue <T>(this PropertyChangingEventHandler changingHandler, PropertyChangedEventHandler changedHandler, T newValue, Expression <Func <T> > oldValueExpression, Action <T> setter)
{
return(changedHandler.SetValue <T>(changingHandler, newValue, oldValueExpression, setter));
}
