Visual Studio 2022 with .net 6 throws error for lambda while deploying

[karthickcse05]

Describe the issue

I installed Visual Studio 2022 enterprise with .net 6 and .net 7 . I created a simple server less lambda application using .net 6 framework

net6.0

"Runtime": "dotnet6",

but i am getting below error when i try to publish to aws lambda from Visual Studio. Any help is much appreciated over here :)

**error NU1202: Package Amazon.Lambda.AspNetCoreServer 8.0.0 is not compatible with net60 (.NETFramework,Version=v6.0). Package Amazon.Lambda.AspNetCoreServer 8.0.0 supports:

net6.0 (.NETCoreApp,Version=v6.0)
netcoreapp3.1 (.NETCoreApp,Version=v3.1)**
Moreover why here .net refers like .net60 and .net6.0 ?

Links

**error NU1202: Package Amazon.Lambda.AspNetCoreServer 8.0.0 is not compatible with net60 (.NETFramework,Version=v6.0). Package Amazon.Lambda.AspNetCoreServer 8.0.0 supports:

net6.0 (.NETCoreApp,Version=v6.0)
netcoreapp3.1 (.NETCoreApp,Version=v3.1)**
Moreover why here .net refers like .net60 and .net6.0 ?

[ashishdhingra]

Hi @karthickcse05,

Good morning.

Could you please check the target framework in your .csproj file? Refer Target frameworks in SDK-style projects for valid target framework monikors. For .NET 6.0 projects, it's net6.0, however, you appear to be using net60 which is invalid. The TFM net60 used to be supported in preview versions of .NET 6.0, which is no longer valid. I tested using the latest version of AWS Toolkit for Visual Studio 2022, it created the project with the correct target framework net6.0 in .csproj file.

Thanks,
Ashish

[karthickcse05]

I have added the screen shot of the .csproj file . the target framework refers to .net6.0

[ashishdhingra]

@karthickcse05 Could you also share aws-lambda-tools-defaults.json.

[karthickcse05]

@karthickcse05 Could you also share aws-lambda-tools-defaults.json.

[ashishdhingra]

@karthickcse05 Thanks. Since I’m unable to reproduce it at my end, kindly share the following:

• Sample code solution (could be attached as zip file to the issue) that reproduces the issue.
• Version of AWS toolkit for Visual Studio 2022 (try upgrading to latest version at your end)

I’m unsure what is editorconfig in your screenshot and if it has any settings that overrides TFM.

Thanks,
Ashish

[karthickcse05]

Thanks. I have latest version of AWS tool kit installed .

PFA the zip file for the code ( it doesn't have much complexity code , just simple code :) ).

In my system , dotnet version is 7.0.201
Is there any other specfic runtime sdk need to get installed.
AWSServerless2.zip

[karthickcse05]

@ashishdhingra , could you pls share the screen shot of dotnet --info , so that i could able to verify what SDK i missed to install

[ashishdhingra]

@karthickcse05 Good afternoon. Even your project works fine:

Processing CloudFormation resource AspNetCoreFunction
Initiate packaging of . for resource AspNetCoreFunction
Executing publish command
... invoking 'dotnet publish', working folder 'D:\Users\<<redacted>>\Downloads\AWSServerless2\AWSServerless2\.\bin\Release\net6.0\publish'
... dotnet publish "D:\Users\<<redacted>>\Downloads\AWSServerless2\AWSServerless2\." --output "D:\Users\<<redacted>>\Downloads\AWSServerless2\AWSServerless2\.\bin\Release\net6.0\publish" --configuration "Release" --framework "net6.0" /p:GenerateRuntimeConfigurationFiles=true --runtime linux-x64 --self-contained False 
... publish: Welcome to .NET 7.0!
... publish: ---------------------
... publish: SDK Version: 7.0.201
... publish: Telemetry
... publish: ---------
... publish: The .NET tools collect usage data in order to help us improve your experience. It is collected by Microsoft and shared with the community. You can opt-out of telemetry by setting the DOTNET_CLI_TELEMETRY_OPTOUT environment variable to '1' or 'true' using your favorite shell.
... publish: Read more about .NET CLI Tools telemetry: https://aka.ms/dotnet-cli-telemetry
... publish: ----------------
... publish: Installed an ASP.NET Core HTTPS development certificate.
... publish: To trust the certificate run 'dotnet dev-certs https --trust' (Windows and macOS only).
... publish: Learn about HTTPS: https://aka.ms/dotnet-https
... publish: ----------------
... publish: Write your first app: https://aka.ms/dotnet-hello-world
... publish: Find out what's new: https://aka.ms/dotnet-whats-new
... publish: Explore documentation: https://aka.ms/dotnet-docs
... publish: Report issues and find source on GitHub: https://github.com/dotnet/core
... publish: Use 'dotnet --help' to see available commands or visit: https://aka.ms/dotnet-cli
... publish: --------------------------------------------------------------------------------------
... publish: MSBuild version 17.5.0-preview-23061-01+040e2a90e for .NET
... publish:   Determining projects to restore...
... publish:   Restored D:\Users\<<redacted>>\Downloads\AWSServerless2\AWSServerless2\AWSServerless2.csproj (in 490 ms).
... publish:   AWSServerless2 -> D:\Users\<<redacted>>\Downloads\AWSServerless2\AWSServerless2\bin\Release\net6.0\linux-x64\AWSServerless2.dll
... publish:   AWSServerless2 -> D:\Users\<<redacted>>\Downloads\AWSServerless2\AWSServerless2\bin\Release\net6.0\publish\
Zipping publish folder D:\Users\<<redacted>>\Downloads\AWSServerless2\AWSServerless2\.\bin\Release\net6.0\publish to C:\Users\<<redacted>>\AppData\Local\Temp\AspNetCoreFunction-CodeUri-Or-ImageUri-638139561391873935.zip
... zipping: Amazon.Lambda.APIGatewayEvents.dll
... zipping: Amazon.Lambda.ApplicationLoadBalancerEvents.dll
... zipping: Amazon.Lambda.AspNetCoreServer.dll
... zipping: Amazon.Lambda.Core.dll
... zipping: Amazon.Lambda.Logging.AspNetCore.dll
... zipping: Amazon.Lambda.Serialization.SystemTextJson.dll
... zipping: appsettings.Development.json
... zipping: appsettings.json
... zipping: aws-lambda-tools-defaults.json
... zipping: AWSServerless2
... zipping: AWSServerless2.deps.json
... zipping: AWSServerless2.dll
... zipping: AWSServerless2.runtimeconfig.json
Created publish archive (C:\Users\<<redacted>>\AppData\Local\Temp\AspNetCoreFunction-CodeUri-Or-ImageUri-638139561391873935.zip).
Lambda project successfully packaged: C:\Users\<<redacted>>\AppData\Local\Temp\AspNetCoreFunction-CodeUri-Or-ImageUri-638139561391873935.zip
Uploading to S3. (Bucket: testbucket-us-east-1-<<redacted>> Key: AWSServerless2/AspNetCoreFunction-CodeUri-Or-ImageUri-<<somerandomnumber>>-<<somerandomnumber>>.zip)
... Progress: 53%
... Progress: 100%
Uploading to S3. (Bucket: testbucket-us-east-1-<<redacted>> Key: AWSServerless2/teststack-serverless-<<redacted>>.template)
... Progress: 100%
Found existing stack: False
CloudFormation change set created
... Waiting for change set to be reviewed
Created CloudFormation stack teststack
Config settings saved to D:\Users\<<redacted>>\Downloads\AWSServerless2\AWSServerless2\aws-lambda-tools-defaults.json

You could view the .NET SDK version in the above logs as 7.0.201. Here is the output of dotnet --list-sdks:

3.1.426 [C:\Program Files\dotnet\sdk]
5.0.406 [C:\Program Files\dotnet\sdk]
5.0.408 [C:\Program Files\dotnet\sdk]
6.0.400 [C:\Program Files\dotnet\sdk]
6.0.406 [C:\Program Files\dotnet\sdk]
7.0.101 [C:\Program Files\dotnet\sdk]
7.0.103 [C:\Program Files\dotnet\sdk]
7.0.200 [C:\Program Files\dotnet\sdk]
7.0.201 [C:\Program Files\dotnet\sdk]

Could you try testing in a different fresh environment?

Thanks,
Ashish