Using API ConfigurationManager in Android project(Xamarin.Forms) throws an exception.

Question

Steps:

1. Add a configuration file in the Android project(app.config).
   <?xml version="1.0" encoding="utf-8"?>
   <configuration>
   <appSettings>
   <add key="key1" value="test1"/>
   <add key="key2" value="test2"/>
   </appSettings>
   </configuration>
2. Install NuGet package in shared project：System.Configuration.ConfigutationManager 5.0.0
3. In shared project, use API ConfigurationManager:
   public MainPage()
   {
   InitializeComponent();
   string str1 = ConfigurationManager.AppSettings["key1"];
   string str2 = ConfigurationManager.AppSettings["key2"];
   Debug.WriteLine(str1);
   Debug.WriteLine(str2);
   }
4. Run the Android project and throw an exception:
   

Answer 1

Hello,

Welcome to Microsoft Q&A!

It looks like ConfigurationManager is not supported on Xamarin.Android.

We recommend you to use Xamarin.Essentials.Preferences instead.

Usage

   //save  
   Preferences.Set("my_key", "my_value");  
     
   //retrieve  
   var myValue = Preferences.Get("my_key", "default_value");  

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