Using multiple themes in UWP apps - styles

Question

I have a multi-language app with two styles named RtlStyles and LtrStyles for RTL and LTR Languages.
I've defined my style in App.xaml Like this:
<Application.Resources>
<ResourceDictionary Source="Styles/RtlStyles.xaml"></ResourceDictionary>
</Application.Resources>
But my problem is how can I change style to LtrStyles in code behind?

Answer 1

In App.OnLaunched(), you can try something like this:
if (someCondition)
{
var rd = new ResourceDictionary
{
Source = new Uri("ms-appx:///Styles/RtlStyles.xaml", UriKind.Absolute)
};
Application.Current.Resources.MergedDictionaries.Add(rd);
}

Answer 2

Thanks to #Gaurav I have a little update on his answer. First I wrote a method for choosing themes:
public static void ChooseTheme()
{
ResourceDictionary rd;
if (CultureInfo.CurrentCulture.Name == "en-US")
rd = new ResourceDictionary
{
Source = new Uri("ms-appx:///Styles/LtrStyles.xaml", UriKind.Absolute)
};
else
rd = new ResourceDictionary
{
Source = new Uri("ms-appx:///Styles/RtlStyles.xaml", UriKind.Absolute)
};
Application.Current.Resources = rd;
}
And then we can use it everywhere (e.g Page_Tapped event of layout).