Im first run android project with xamarin. but It was run for the first time and I got this error for the second time
Severity Code Description Project File Line Suppression State
Error ADB1000: Deployment failed
Xamarin.AndroidTools.AndroidDeploymentException: FailedToSynchronizeFastDevAssemblies ---> Mono.AndroidTools.AdbException: Read-only file system
at Mono.AndroidTools.Util.AggregateAsyncResult.CheckError(CancellationToken token) in C:\A\vs2019mb-000030-1\_work\21\s\External\androidtools\Mono.AndroidTools\Util\AggregateAsyncResult.cs:line 72
at Mono.AndroidTools.Adb.AdbSyncClient.EndPushSyncItems(IAsyncResult result) in C:\A\vs2019mb-000030-1\_work\21\s\External\androidtools\Mono.AndroidTools\Adb\AdbSyncClient.cs:line 1071
at Mono.AndroidTools.Internal.AdbClientTaskExtensions.InnerInvoke(TaskCompletionSource`1 tcs, Func`2 endMethod, IAsyncResult l) in C:\A\vs2019mb-000030-1\_work\21\s\External\androidtools\Mono.AndroidTools\Internal\AdbClientTaskExtensions.cs:line 255
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.ValidateEnd(Task task)
at Xamarin.AndroidTools.AndroidDeploySession.<InstallAssemblies>d__117.MoveNext() in C:\A\vs2019mb-000030-1\_work\21\s\External\androidtools\Xamarin.AndroidTools\Sessions\AndroidDeploySession.cs:line 578
--- End of inner exception stack trace ---
at Xamarin.AndroidTools.AndroidDeploySession.<InstallAssemblies>d__117.MoveNext() in C:\A\vs2019mb-000030-1\_work\21\s\External\androidtools\Xamarin.AndroidTools\Sessions\AndroidDeploySession.cs:line 586
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at Xamarin.AndroidTools.AndroidDeploySession.<FastDevAsync>d__114.MoveNext() in C:\A\vs2019mb-000030-1\_work\21\s\External\androidtools\Xamarin.AndroidTools\Sessions\AndroidDeploySession.cs:line 478
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.ValidateEnd(Task task)
at Xamarin.AndroidTools.AndroidDeploySession.<RunAsync>d__106.MoveNext() in C:\A\vs2019mb-000030-1\_work\21\s\External\androidtools\Xamarin.AndroidTools\Sessions\AndroidDeploySession.cs:line 225
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at Xamarin.AndroidTools.AndroidDeploySession.<RunLoggedAsync>d__104.MoveNext() in C:\A\vs2019mb-000030-1\_work\21\s\External\androidtools\Xamarin.AndroidTools\Sessions\AndroidDeploySession.cs:line 119 0
I have had this problem before. I think this is a mono problem. To fix this, I uninstalled and reinstalled the app or
navigate to SDK root and cmd :
adb.exe uninstall packgename