Building Your First Android & iOS App in Visual Studio 2017

The Discussion

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  When I ran the program I got the error: "Cold boot: snapshot doesn't exist" [Dismiss] on an all black screen, which disappears after a few seconds. I don't know what to do next. (There were 0 errors and 5 warnings in the Error List.)

  Severity Code Description Project File Line Suppression State

  1. Warning Certificate file 'App1.UWP_TemporaryKey.pfx' not found. App1.UWP 
  2. Severity Code Description Project File Line Suppression State
     Warning The certificate specified is not valid for signing. For more information about valid certificates, see http://go.microsoft.com/fwlink/?LinkID=241478. App1.UWP
  3. Severity Code Description Project File Line Suppression State
     Warning No Address and User has been specified in order to establish a connection to a Mac Server, so only the main assembly was compiled for project 'App1.iOS'. Connect to a Mac Server and try again to build the full application. App1.iOS
  4. Severity Code Description Project File Line Suppression State
     Warning There is no available connection to the Mac, hence the task ResolveUniversalTypeIdentifiers will not be executed App1.iOS
  5. Severity Code Description Project File Line Suppression State
     Warning There is no available connection to the Mac, hence the task Xamarin.MacDev.Tasks.CollectBundleResources will not be executed App1.iOS

• 

  Worked for me.. following step by step. :) 

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  @LouieInSeattle:Was this on the PC? Seems like maybe an issue with the Android emulator. Sometimes a cold boot occurs on android emulators based on different machine resources. It should startup after. Did it eventually boot? 

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  @TheRoyLink:Awesome!

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  Very Good artical

• 

  Hi,
  since 21 year I'm programming in VBA. However, I never learned C++.
  Do you have as well tutorial showing first app (like in this video) created with VB?
  Remark: in my VS 2017 I don't have "Cross-Platform) in VB drop-down list.
  
  Thanks and regards
  
  Robert