Working with Resource Files
When it comes to managing string resources for localization purposes, there are some file formats that you will need to work with. Applications written with the .NET Framework make use of the RESX file format. Xamarin.Android applications can also use the native Android strings.xml file. Apps written with Xamarin.iOS can use the native LocalizedString files. To manage language resource files for use with translation professionals, you can import and export XLIFF files.