Basic of AWS SDK for .NET

What is the AWS SDK for .NET?

The AWS SDK for .NET makes it easier to build .NET applications that tap into cost-effective, scalable, and reliable AWS services such as Amazon Simple Storage Service (Amazon S3) and Amazon Elastic Compute Cloud (Amazon EC2). The SDK simplifies the use of AWS services by providing a set of libraries that are consistent and familiar for .NET developers..

AWS tools related to the AWS SDK for .NET

Tools for Windows PowerShell and Tools for PowerShell Core

The AWS Tools for Windows PowerShell and AWS Tools for PowerShell Core are PowerShell modules that are built on the functionality exposed by the AWS SDK for .NET. The AWS PowerShell tools enable you to script operations on your AWS resources from the PowerShell prompt. Although the cmdlets are implemented using the service clients and methods from the SDK, the cmdlets provide an idiomatic PowerShell experience for specifying parameters and handling results.

Toolkit for VS Code

The AWS Toolkit for Visual Studio Code is a plugin for the Visual Studio Code (VS Code) editor. The toolkit makes it easier for you to develop, debug, and deploy applications that use AWS.

With the toolkit, you can do such things as the following:

  • Create serverless applications that contain AWS Lambda functions, and then deploy the applications to an AWS CloudFormation stack.
  • Work with Amazon EventBridge schemas.
  • Use IntelliSense when working with Amazon ECS task-definition files.
  • Visualize an AWS Cloud Development Kit (CDK) application.

Toolkit for Visual Studio

The AWS Toolkit for Visual Studio is a plugin for the Visual Studio IDE that makes it easier for you to develop, debug, and deploy .NET applications that use Amazon Web Services. The Toolkit for Visual Studio provides Visual Studio templates for services such as Lambda and deployment wizards for web applications and serverless applications. You can use the AWS Explorer to manage Amazon EC2 instances, work with Amazon DynamoDB tables, publish messages to Amazon Simple Notification Service (Amazon SNS) queues, and more, all within Visual Studio.

Platforms supported by the AWS SDK for .NET

The AWS SDK for .NET provides distinct groups of assemblies for developers to target different platforms. However, not all SDK functionality is the same on each of these platforms. This topic describes the differences in support for each platform.

.NET Core

The AWS SDK for .NET supports applications written for .NET Core. AWS service clients only support asynchronous calling patterns in .NET core. This also affects many of the high level abstractions built on top of service clients like Amazon S3’s TransferUtility which will only support asynchronous calls in the .NET Core environment.

.NET Standard 2.0

Non-Framework variations of the AWS SDK for .NET comply with .NET Standard 2.0.

.NET Framework 4.5

This version of the AWS SDK for .NET is compiled against .NET Framework 4.5 and runs in the .NET 4.0 runtime. AWS service clients support synchronous and asynchronous calling patterns and use the async and await keywords introduced in C# 5.0.

.NET Framework 3.5

This version of the AWS SDK for .NET is compiled against .NET Framework 3.5, and runs in either the .NET 2.0 or .NET 4.0 runtime. AWS service clients support synchronous and asynchronous calling patterns and use the older Begin and End pattern.

Portable Class Library and Xamarin

The AWS SDK for .NET also contains a Portable Class Library implementation. The Portable Class Library implementation can target multiple platforms, including Universal Windows Platform (UWP) and Xamarin on iOS and Android. See the Mobile SDK for .NET and Xamarin for more details. AWS service clients only support asynchronous calling patterns.

Listing AWS resources using AWS CloudFormation

how to use the AWS SDK for .NET to list the resources in AWS CloudFormation stacks. The example uses the low-level API. The application takes no arguments, but simply gathers information for all stacks that are accessible to the user’s credentials and then displays information about those stacks.

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SDK references

NuGet packages:

Programming elements:

using System;
using System.Threading.Tasks;
using Amazon.CloudFormation;
using Amazon.CloudFormation.Model;

namespace CFNListResources
{
  class Program
  {
    static async Task Main(string[] args)
    {
      // Create the CloudFormation client
      var cfnClient = new AmazonCloudFormationClient();

      // List the resources for each stack
      await ListResources(cfnClient, await cfnClient.DescribeStacksAsync());
    }

    //
    // Method to list stack resources and other information
    private static async Task ListResources(
      IAmazonCloudFormation cfnClient, DescribeStacksResponse responseDescribeStacks)
    {
      Console.WriteLine("Getting CloudFormation stack information...");

      foreach (Stack stack in responseDescribeStacks.Stacks)
      {
        // Basic information for each stack
        Console.WriteLine("\n------------------------------------------------");
        Console.WriteLine($"\nStack: {stack.StackName}");
        Console.WriteLine($"  Status: {stack.StackStatus.Value}");
        Console.WriteLine($"  Created: {stack.CreationTime}");

        // The tags of each stack (etc.)
        if(stack.Tags.Count > 0)
        {
          Console.WriteLine("  Tags:");
          foreach (Tag tag in stack.Tags)
            Console.WriteLine($"    {tag.Key}, {tag.Value}");
        }

        // The resources of each stack
        DescribeStackResourcesResponse responseDescribeResources =
          await cfnClient.DescribeStackResourcesAsync(new DescribeStackResourcesRequest{
            StackName = stack.StackName});
        if(responseDescribeResources.StackResources.Count > 0)
        {
          Console.WriteLine("  Resources:");
          foreach(StackResource resource in responseDescribeResources.StackResources)
            Console.WriteLine($"    {resource.LogicalResourceId}: {resource.ResourceStatus}");
        }
      }
      Console.WriteLine("\n------------------------------------------------");
    }
  }
}

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