You can also open the built-in map application on the device to show directions to any given address. For example if you have some addressing in your database, you can add a button in your app which calls the Launch directions method with the address data. This means that you do not need to build any UI for a map and directions yourself and this works like any external link.

var destination = new NavigationAddress
{
    Zip = "SM4 5BE",
    City = "London",
    Country = "England"
};

await Device.Location.LaunchDirections(destination);