Building Lambda functions with C#

You can run your .NET application in Lambda using the managed .NET 6 or .NET 8 runtimes, a custom runtime, or a container image. After your application code is compiled, you can deploy it to Lambda either as a .zip file or a container image. Lambda provides the following runtimes for .NET languages:

Name	Identifier	Operating system	Deprecation date	Block function create	Block function update
.NET 8	dotnet8	Amazon Linux 2023	Not scheduled	Not scheduled	Not scheduled
.NET 6	dotnet6	Amazon Linux 2	Dec 20, 2024	Feb 28, 2025	Mar 31, 2025

Setting up your .NET development environment

To develop and build your Lambda functions, you can use any of the commonly available .NET integrated development environments (IDEs), including Microsoft Visual Studio, Visual Studio Code, and JetBrains Rider. To simplify your development experience, AWS provides a set of .NET project templates, as well as the Amazon.Lambda.Tools command line interface (CLI).

Run the following .NET CLI commands to install these project templates and command line tools.

Installing the .NET project templates

To install the project templates (.NET 8):

dotnet new install Amazon.Lambda.Templates

To install the project templates (.NET 6):

dotnet new --install Amazon.Lambda.Templates

Note

If you're using the .NET 6 managed Lambda runtime, we recommend that you upgrade to use .NET 8. To learn more, see Managing AWS Lambda runtime upgrades and Introducing the .NET 8 runtime for AWS Lambda on the AWS Compute Blog.

Installing and updating the CLI tools

Run the following commands to install, update, and uninstall the Amazon.Lambda.Tools CLI.

To install the command line tools:

dotnet tool install -g Amazon.Lambda.Tools

To update the command line tools:

dotnet tool update -g Amazon.Lambda.Tools

To uninstall the command line tools:

dotnet tool uninstall -g Amazon.Lambda.Tools