AWS SDK Version 3 for .NET
API Reference

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Container for the parameters to the DetachInstances operation. Removes one or more instances from the specified Auto Scaling group.

After the instances are detached, you can manage them independent of the Auto Scaling group.

If you do not specify the option to decrement the desired capacity, Amazon EC2 Auto Scaling launches instances to replace the ones that are detached.

If there is a Classic Load Balancer attached to the Auto Scaling group, the instances are deregistered from the load balancer. If there are target groups attached to the Auto Scaling group, the instances are deregistered from the target groups.

For more information, see Detach EC2 Instances from Your Auto Scaling Group in the Amazon EC2 Auto Scaling User Guide.

Inheritance Hierarchy


Namespace: Amazon.AutoScaling.Model
Assembly: AWSSDK.AutoScaling.dll
Version: 3.x.y.z


public class DetachInstancesRequest : AmazonAutoScalingRequest

The DetachInstancesRequest type exposes the following members


Public Method DetachInstancesRequest()


Public Property AutoScalingGroupName System.String

Gets and sets the property AutoScalingGroupName.

The name of the Auto Scaling group.

Public Property InstanceIds System.Collections.Generic.List<System.String>

Gets and sets the property InstanceIds.

The IDs of the instances. You can specify up to 20 instances.

Public Property ShouldDecrementDesiredCapacity System.Boolean

Gets and sets the property ShouldDecrementDesiredCapacity.

Indicates whether the Auto Scaling group decrements the desired capacity value by the number of instances detached.


This example detaches the specified instance from the specified Auto Scaling group.

To detach an instance from an Auto Scaling group

var response = client.DetachInstances(new DetachInstancesRequest 
    AutoScalingGroupName = "my-auto-scaling-group",
    InstanceIds = new List<string> {
    ShouldDecrementDesiredCapacity = true

List<Activity> activities = response.Activities;


Version Information

.NET Standard:
Supported in: 1.3

.NET Framework:
Supported in: 4.5, 4.0, 3.5

Portable Class Library:
Supported in: Windows Store Apps
Supported in: Windows Phone 8.1
Supported in: Xamarin Android
Supported in: Xamarin iOS (Unified)
Supported in: Xamarin.Forms