The package was not properly signed (NO_CERTIFICATES) in running application

Question

I am developing xamarin forms application and i got the below error when running application on android emulator

>The package was not properly signed (NO_CERTIFICATES).
2>   at Mono.AndroidTools.Internal.AdbOutputParsing.CheckInstallSuccess(String output, String packageName)
2>   at Mono.AndroidTools.AndroidDevice.<>c__DisplayClass94_0.<InstallPackage>b__0(Task`1 t)
2>   at System.Threading.Tasks.ContinuationTaskFromResultTask`1.InnerInvoke()
2>   at System.Threading.Tasks.Task.Execute()
2>Done building project "Modern.FM.Mobile.Android.csproj".
2>Build succeeded.
2>The package was not properly signed (NO_CERTIFICATES).
2>   at Mono.AndroidTools.Internal.AdbOutputParsing.CheckInstallSuccess(String output, String packageName)
2>   at Mono.AndroidTools.AndroidDevice.<>c__DisplayClass94_0.<InstallPackage>b__0(Task`1 t)
2>   at System.Threading.Tasks.ContinuationTaskFromResultTask`1.InnerInvoke()
2>   at System.Threading.Tasks.Task.Execute()

Answer 1

I just delete all file in Folder /bin from my Android project and recompile.

Answer 2

This problem happened after installing visual studio 2017 updates. after running visual studio repair everything worked fine.

Answer 3

If none of the other solutions work, just open your android project options, and then go to Android Package Signing, and make sure "Sign the .APK file..." is deselected for all the configurations and platforms, as shown: