Nullable Monad Pattern Example: SiteMapBase.GetActualCurrentNode().IfNotNull(x => x.Title)

NullableMonad

public static TResult IfNotNull<T, TResult>(this T input, Func<T, TResult> action, TResult valueIfNull)
    where T : class
{
    if (input != null) return action(input);
    else return valueIfNull;
}

public static TResult IfNotNull<T, TResult>(this T input, Func<T, TResult> action)
    where T : class
    where TResult : class
{ 
    return input.IfNotNull(action, null); 
}