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Xamarin build error

I have installed Visual studio 2017 community edition .I selected xamarin developement.I just created project as follows

In visual C#,Cross Plateform -> Cross Platform Apps or Native->Blank APP .UI technology Xamarin forms option
And Portable Class Library.And Just build project.I Get following error.Please let me know If any nuget package needs to be updated,Or what else shold I do?.I need answer as early as possible.I am getting following error.

Severity Code Description Project File Line Suppression State
Warning IDE0006 Error encountered while loading the project. Some project features, such as full solution analysis for the failed project and projects that depend on it, have been disabled. Hello.Android 1 Active

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Jackie Man

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SOLUTION

ADITYA RAO

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ADITYA RAO

ASKER

Actually I tried the soltion but in my computer there is no change option coming on right click .If I left click it is directly asking for nistalling of visual studio 2017

.Please help me. How can I proceed.

ADITYA RAO

ASKER

Severity      Code      Description      Project      File      Line      Suppression State
Error            An error occurred trying to install required android components on Project 'myretry.Android'.
Project 'myretry.Android' requires the following components installed on your machine:
Xamarin.Android.Support.v7.AppCompat
JavaLibraryReference: https://dl-ssl.google.com/android/repository/android_m2repository_r29.zip-m2repository/com/android/support/appcompat-v7/23.3.0/appcompat-v7-23.3.0.aar-23.3.0.0
AndroidResources: https://dl-ssl.google.com/android/repository/android_m2repository_r29.zip-m2repository/com/android/support/appcompat-v7/23.3.0/appcompat-v7-23.3.0.aar-23.3.0.0
Xamarin.Android.Support.v7.MediaRouter
JavaLibraryReference: https://dl-ssl.google.com/android/repository/android_m2repository_r29.zip-m2repository/com/android/support/mediarouter-v7/23.3.0/mediarouter-v7-23.3.0.aar-23.3.0.0
JavaLibraryReference: https://dl-ssl.google.com/android/repository/android_m2repository_r29.zip-m2repository/com/android/support/mediarouter-v7/23.3.0/mediarouter-v7-23.3.0.aar-23.3.0.0
AndroidResources: https://dl-ssl.google.com/android/repository/android_m2repository_r29.zip-m2repository/com/android/support/mediarouter-v7/23.3.0/mediarouter-v7-23.3.0.aar-23.3.0.0

Please double-click here to install it.

Intallation Errors: XA5209 Unzipping failed. Please download 'https://dl-ssl.google.com/android/repository/android_m2repository_r29.zip:m2repository/com/android/support/appcompat-v7/23.3.0/appcompat-v7-23.3.0.aar' and extract it to the 'C:\Users\Aditya\AppData\Local\Xamarin\Xamarin.Android.Support.v7.AppCompat\23.3.0.0\embedded' directory
XA5209 Reason: The process cannot access the file 'C:\Users\Aditya\AppData\Local\Xamarin\Xamarin.Android.Support.v7.AppCompat\23.3.0.0\embedded\res\drawable-xxhdpi-v4' because it is being used by another process.
XA5207 Please install package: 'Xamarin.Android.Support.v7.AppCompat' available in SDK installer. Java library file 'C:\Program Files (x86)\Android\android-sdk\extras\android\classes.jar' doesn't exist.
XA5207 Please install package: 'Xamarin.Android.Support.v7.MediaRouter' available in SDK installer. Java library file 'C:\Program Files (x86)\Android\android-sdk\extras\android\classes.jar' doesn't exist.
XA5207 Please install package: 'Xamarin.Android.Support.v7.MediaRouter' available in SDK installer. Java library file 'C:\Program Files (x86)\Android\android-sdk\extras\android\libs/internal_impl-23.3.0.jar' doesn't exist.                   0