Building Lambda functions with C# - Amazon Lambda
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Building Lambda functions with C#

The following sections explain how common programming patterns and core concepts apply when authoring Lambda function code in C#.

Amazon Lambda provides the following libraries for C# functions. These packages are available as Nuget packages.

Tools and libraries for C#

  • Amazon.Lambda.Core – This library provides a static Lambda logger, serialization interfaces and a context object. The Context object (Amazon Lambda context object in C#) provides runtime information about your Lambda function.

  • Amazon.Lambda.Serialization.Json – This is an implementation of the serialization interface in Amazon.Lambda.Core.

  • Amazon.Lambda.Logging.AspNetCore – This provides a library for logging from ASP.NET.

  • Event objects (POCOs) for several Amazon services, including:

    • Amazon.Lambda.APIGatewayEvents

    • Amazon.Lambda.CognitoEvents

    • Amazon.Lambda.ConfigEvents

    • Amazon.Lambda.DynamoDBEvents

    • Amazon.Lambda.KinesisEvents

    • Amazon.Lambda.S3Events

    • Amazon.Lambda.SQSEvents

    • Amazon.Lambda.SNSEvents

Lambda provides the following runtimes for .NET languages:

.NET
Name Identifier Operating system Architectures Deprecation (Phase 1)

.NET 7 (container only)

dotnet7

Amazon Linux 2

x86_64, arm64

May 14, 2024

.NET 6

dotnet6

Amazon Linux 2

x86_64, arm64

To get started with application development in your local environment, deploy one of the sample applications available in this guide's GitHub repository.

Sample Lambda applications in C#

  • blank-csharp – A C# function that shows the use of Lambda's .NET libraries, logging, environment variables, Amazon X-Ray tracing, unit tests, and the Amazon SDK.

  • blank-csharp-with-layer – A C# function that uses the .NET CLI to create a layer that packages the function's dependencies.

  • ec2-spot – A function that manages spot instance requests in Amazon EC2.

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