AttachNetworkInterfaceResponse

This example attaches the specified network interface to the specified instance.

To attach a network interface to an instance

var client = new AmazonEC2Client();
var response = client.AttachNetworkInterface(new AttachNetworkInterfaceRequest 
{
    DeviceIndex = 1,
    InstanceId = "i-1234567890abcdef0",
    NetworkInterfaceId = "eni-e5aa89a3"
});

string attachmentId = response.AttachmentId;