适用于 .NET 的 AWS SDK V3 已进入维护模式。

我们建议您迁移到 [适用于 .NET 的 AWS SDK V4](https://docs.aws.amazon.com/sdk-for-net/v4/developer-guide/welcome.html)。有关如何迁移的更多详细信息和信息，请参阅我们的[维护模式公告](https://aws.amazon.com/blogs/developer/aws-sdk-for-net-v3-maintenance-mode-announcement/)。

本文属于机器翻译版本。若本译文内容与英语原文存在差异，则一律以英文原文为准。

# 终止 Amazon EC2 实例
<a name="terminate-instance"></a>

如果您不再需要一个或多个 Amazon EC2 实例，则可终止这些实例。

此示例向您展示如何使用终止 EC2 实例。 适用于 .NET 的 AWS SDK 它以实例 ID 作为输入。

## SDK 参考
<a name="w2aac19c15c17c19c11b7b1"></a>

NuGet 包裹：
+ [AWSSDK.EC2](https://www.nuget.org/packages/AWSSDK.EC2)

编程元素：
+ 命名空间 [Amazon.EC2](https://docs.aws.amazon.com/sdkfornet/v3/apidocs/items/EC2/NEC2.html)

  [Amazon EC2 客户端](https://docs.aws.amazon.com/sdkfornet/v3/apidocs/items/EC2/TEC2Client.html)
+ 命名空间 [Amazon.EC2.Model](https://docs.aws.amazon.com/sdkfornet/v3/apidocs/items/EC2/NEC2Model.html)

  班级 [TerminateInstancesRequest](https://docs.aws.amazon.com/sdkfornet/v3/apidocs/items/EC2/TTerminateInstancesRequest.html)

  班级 [TerminateInstancesResponse](https://docs.aws.amazon.com/sdkfornet/v3/apidocs/items/EC2/TTerminateInstancesResponse.html)

```
using System;
using System.Threading.Tasks;
using System.Collections.Generic;
using Amazon.EC2;
using Amazon.EC2.Model;

namespace EC2TerminateInstance
{
  class Program
  {
    static async Task Main(string[] args)
    {
      if((args.Length == 1) && (args[0].StartsWith("i-")))
      {
        // Terminate the instance
        var ec2Client = new AmazonEC2Client();
        await TerminateInstance(ec2Client, args[0]);
      }
      else
      {
        Console.WriteLine("\nCommand-line argument missing or incorrect.");
        Console.WriteLine("\nUsage: EC2TerminateInstance instance-ID");
        Console.WriteLine("  instance-ID - The EC2 instance you want to terminate.");
        return;
      }
    }

    //
    // Method to terminate an EC2 instance
    private static async Task TerminateInstance(IAmazonEC2 ec2Client, string instanceID)
    {
      var request = new TerminateInstancesRequest{
        InstanceIds = new List<string>() { instanceID }};
      TerminateInstancesResponse response =
        await ec2Client.TerminateInstancesAsync(new TerminateInstancesRequest{
          InstanceIds = new List<string>() { instanceID }
        });
      foreach (InstanceStateChange item in response.TerminatingInstances)
      {
        Console.WriteLine("Terminated instance: " + item.InstanceId);
        Console.WriteLine("Instance state: " + item.CurrentState.Name);
      }
    }
  }
}
```

运行该示例后，最好登录 [Amazon EC2 控制台](https://console.aws.amazon.com/ec2/)来验证 [EC2 实例](https://console.aws.amazon.com/ec2/v2/home#Instances)是否已终止。