Error: Could not Install Package Microsoft.IdentityModel.Client.ActiveDirectory in Xamarin.Forms

ADAL does not support windows phone 8.1 version so we need to follow below steps for resolve above shown issue

Remove Installed all Nuget package
Removing the windows Phone 8.1 project from solution
Remove target platform from the PCL project
Step 1: Remove Installed all Nuget package
Go To solution > Right Click > Manage Nuget Packages > Click on Installed tab > uninstall all installed package like (Including Xamarin.Form etc ) .
If you are not uninstall the package and trying to change the targeted platforms by removing the target Windows Phone 8.1 you would get an error.



Step 2: Remove the Windows 8.1 project from Solution

ADAL does not support Windows Phone 8.1 so you need remove windows 8.1 project from solution . Only removing the Windows Phone 8.1. project from your solution will not resolve this issue. You still need follow next steps as well

Step 3: Remove target platform from the PCL project

Right click on your PCL project > Click on “Properties” > Go to the tab “Library” > You can see list of targeted platforms > Press the button “Change” > uncheck the target “Windows Phone 8.1” and “ Windows Phone Silvelight 8” > Press the “OK” button

Wait a few seconds and the dialog will be gone and the target is removed from the PCL project.



Now you can able to install ADAL nuget package from your solution