why are those errors appearing in my console?

Question

I've just made a setup for C# in vs code, and I wanted to run a hello world app but those errors appear :

C:\Program Files\dotnet\sdk\6.0.301\Sdks\Microsoft.NET.Sdk\targets\Microsoft.NET.Sdk.targets(554,5): error MSB4018: Échec inattendu
 de la tâche "CreateAppHost". [C:\Users\insaf\OneDrive\Bureau\csharp\csharp.csproj]
C:\Program Files\dotnet\sdk\6.0.301\Sdks\Microsoft.NET.Sdk\targets\Microsoft.NET.Sdk.targets(554,5): error MSB4018: System.Aggregat
eException: One or more errors occurred. (Access to the path 'C:\Users\insaf\OneDrive\Bureau\csharp\obj\Debug\net6.0\apphost.exe' i 
s denied.) (Access to the path 'C:\Users\insaf\OneDrive\Bureau\csharp\obj\Debug\net6.0\apphost.exe' is denied.) [C:\Users\insaf\One 
Drive\Bureau\csharp\csharp.csproj]
C:\Program Files\dotnet\sdk\6.0.301\Sdks\Microsoft.NET.Sdk\targets\Microsoft.NET.Sdk.targets(554,5): error MSB4018:  ---> System.Un 
authorizedAccessException: Access to the path 'C:\Users\insaf\OneDrive\Bureau\csharp\obj\Debug\net6.0\apphost.exe' is denied. [C:\U 
sers\insaf\OneDrive\Bureau\csharp\csharp.csproj]
C:\Program Files\dotnet\sdk\6.0.301\Sdks\Microsoft.NET.Sdk\targets\Microsoft.NET.Sdk.targets(554,5): error MSB4018:    at Microsoft 
.Win32.SafeHandles.SafeFileHandle.CreateFile(String fullPath, FileMode mode, FileAccess access, FileShare share, FileOptions option 
s) [C:\Users\insaf\OneDrive\Bureau\csharp\csharp.csproj]
C:\Program Files\dotnet\sdk\6.0.301\Sdks\Microsoft.NET.Sdk\targets\Microsoft.NET.Sdk.targets(554,5): error MSB4018:    at Microsoft 
.Win32.SafeHandles.SafeFileHandle.Open(String fullPath, FileMode mode, FileAccess access, FileShare share, FileOptions options, Int 
64 preallocationSize) [C:\Users\insaf\OneDrive\Bureau\csharp\csharp.csproj]
C:\Program Files\dotnet\sdk\6.0.301\Sdks\Microsoft.NET.Sdk\targets\Microsoft.NET.Sdk.targets(554,5): error MSB4018:    at System.IO 
.Strategies.OSFileStreamStrategy..ctor(String path, FileMode mode, FileAccess access, FileShare share, FileOptions options, Int64 p 
reallocationSize) [C:\Users\insaf\OneDrive\Bureau\csharp\csharp.csproj]
C:\Program Files\dotnet\sdk\6.0.301\Sdks\Microsoft.NET.Sdk\targets\Microsoft.NET.Sdk.targets(554,5): error MSB4018:    at System.IO 
.Strategies.FileStreamHelpers.ChooseStrategyCore(String path, FileMode mode, FileAccess access, FileShare share, FileOptions option 
s, Int64 preallocationSize) [C:\Users\insaf\OneDrive\Bureau\csharp\csharp.csproj]
C:\Program Files\dotnet\sdk\6.0.301\Sdks\Microsoft.NET.Sdk\targets\Microsoft.NET.Sdk.targets(554,5): error MSB4018:    at System.IO 
.Strategies.FileStreamHelpers.ChooseStrategy(FileStream fileStream, String path, FileMode mode, FileAccess access, FileShare share, 
 Int32 bufferSize, FileOptions options, Int64 preallocationSize) [C:\Users\insaf\OneDrive\Bureau\csharp\csharp.csproj]
C:\Program Files\dotnet\sdk\6.0.301\Sdks\Microsoft.NET.Sdk\targets\Microsoft.NET.Sdk.targets(554,5): error MSB4018:    at System.IO 
.FileStream..ctor(String path, FileMode mode) [C:\Users\insaf\OneDrive\Bureau\csharp\csharp.csproj]
C:\Program Files\dotnet\sdk\6.0.301\Sdks\Microsoft.NET.Sdk\targets\Microsoft.NET.Sdk.targets(554,5): error MSB4018:    at Microsoft 
.NET.HostModel.AppHost.HostWriter.<>c__DisplayClass2_0.<CreateAppHost>b__2() [C:\Users\insaf\OneDrive\Bureau\csharp\csharp.csproj]  
C:\Program Files\dotnet\sdk\6.0.301\Sdks\Microsoft.NET.Sdk\targets\Microsoft.NET.Sdk.targets(554,5): error MSB4018:    at Microsoft 
.NET.HostModel.RetryUtil.RetryOnIOError(Action func) [C:\Users\insaf\OneDrive\Bureau\csharp\csharp.csproj]
C:\Program Files\dotnet\sdk\6.0.301\Sdks\Microsoft.NET.Sdk\targets\Microsoft.NET.Sdk.targets(554,5): error MSB4018:    at Microsoft 
.NET.HostModel.AppHost.HostWriter.CreateAppHost(String appHostSourceFilePath, String appHostDestinationFilePath, String appBinaryFi 
lePath, Boolean windowsGraphicalUserInterface, String assemblyToCopyResorcesFrom, Boolean enableMacOSCodeSign) [C:\Users\insaf\OneD 
rive\Bureau\csharp\csharp.csproj]
C:\Program Files\dotnet\sdk\6.0.301\Sdks\Microsoft.NET.Sdk\targets\Microsoft.NET.Sdk.targets(554,5): error MSB4018:    --- End of i 
nner exception stack trace --- [C:\Users\insaf\OneDrive\Bureau\csharp\csharp.csproj]
C:\Program Files\dotnet\sdk\6.0.301\Sdks\Microsoft.NET.Sdk\targets\Microsoft.NET.Sdk.targets(554,5): error MSB4018:    at Microsoft 
.NET.HostModel.AppHost.HostWriter.CreateAppHost(String appHostSourceFilePath, String appHostDestinationFilePath, String appBinaryFi 
lePath, Boolean windowsGraphicalUserInterface, String assemblyToCopyResorcesFrom, Boolean enableMacOSCodeSign) [C:\Users\insaf\OneD 
rive\Bureau\csharp\csharp.csproj]
C:\Program Files\dotnet\sdk\6.0.301\Sdks\Microsoft.NET.Sdk\targets\Microsoft.NET.Sdk.targets(554,5): error MSB4018:    at Microsoft 
.NET.Build.Tasks.CreateAppHost.ExecuteCore() [C:\Users\insaf\OneDrive\Bureau\csharp\csharp.csproj]
C:\Program Files\dotnet\sdk\6.0.301\Sdks\Microsoft.NET.Sdk\targets\Microsoft.NET.Sdk.targets(554,5): error MSB4018:    at Microsoft 
.NET.Build.Tasks.TaskBase.Execute() [C:\Users\insaf\OneDrive\Bureau\csharp\csharp.csproj]
C:\Program Files\dotnet\sdk\6.0.301\Sdks\Microsoft.NET.Sdk\targets\Microsoft.NET.Sdk.targets(554,5): error MSB4018:    at Microsoft 
.Build.BackEnd.TaskExecutionHost.Microsoft.Build.BackEnd.ITaskExecutionHost.Execute() [C:\Users\insaf\OneDrive\Bureau\csharp\csharp 
.csproj]
C:\Program Files\dotnet\sdk\6.0.301\Sdks\Microsoft.NET.Sdk\targets\Microsoft.NET.Sdk.targets(554,5): error MSB4018:    at Microsoft 
.Build.BackEnd.TaskBuilder.ExecuteInstantiatedTask(ITaskExecutionHost taskExecutionHost, TaskLoggingContext taskLoggingContext, Tas 
kHost taskHost, ItemBucket bucket, TaskExecutionMode howToExecuteTask) [C:\Users\insaf\OneDrive\Bureau\csharp\csharp.csproj]        
C:\Program Files\dotnet\sdk\6.0.301\Sdks\Microsoft.NET.Sdk\targets\Microsoft.NET.Sdk.targets(554,5): error MSB4018:  ---> (Inner Ex 
ception #1) System.UnauthorizedAccessException: Access to the path 'C:\Users\insaf\OneDrive\Bureau\csharp\obj\Debug\net6.0\apphost. 
exe' is denied. [C:\Users\insaf\OneDrive\Bureau\csharp\csharp.csproj]
C:\Program Files\dotnet\sdk\6.0.301\Sdks\Microsoft.NET.Sdk\targets\Microsoft.NET.Sdk.targets(554,5): error MSB4018:    at System.IO 
.FileSystem.DeleteFile(String fullPath) [C:\Users\insaf\OneDrive\Bureau\csharp\csharp.csproj]
C:\Program Files\dotnet\sdk\6.0.301\Sdks\Microsoft.NET.Sdk\targets\Microsoft.NET.Sdk.targets(554,5): error MSB4018:    at System.IO 
.File.Delete(String path) [C:\Users\insaf\OneDrive\Bureau\csharp\csharp.csproj]
C:\Program Files\dotnet\sdk\6.0.301\Sdks\Microsoft.NET.Sdk\targets\Microsoft.NET.Sdk.targets(554,5): error MSB4018:    at Microsoft 
.NET.HostModel.AppHost.HostWriter.CreateAppHost(String appHostSourceFilePath, String appHostDestinationFilePath, String appBinaryFi 
lePath, Boolean windowsGraphicalUserInterface, String assemblyToCopyResorcesFrom, Boolean enableMacOSCodeSign)<--- [C:\Users\insaf\ 
OneDrive\Bureau\csharp\csharp.csproj]
C:\Program Files\dotnet\sdk\6.0.301\Sdks\Microsoft.NET.Sdk\targets\Microsoft.NET.Sdk.targets(554,5): error MSB4018:  [C:\Users\insa 
f\OneDrive\Bureau\csharp\csharp.csproj]

Answer 1

You see the second line says this

 Access to the path 'C:\Users\insaf\OneDrive\Bureau\csharp\obj\Debug\net6.0\apphost.exe' is denied.)

Looks like a clue to me -- did you check this directory to see if it is available?

Answer 2

It should be a problem caused by onedrive file permissions or synchronization. Exit onedrive after all onedrive synchronization is completed, delete the obj directory in the project, and then use VS Code to perform operations such as modification,compilation,etc.