AWS SDK for .NET Documentation
VolumeType Property
AmazonAmazon.EC2.ModelCreateVolumeRequestVolumeType Did this page help you?   Yes   No    Tell us about it...
The volume type. Value may be either "io1" or "standard". If VolumeType != "io1", IOPS property cannot be set.
Declaration Syntax
C#
public string VolumeType { get; set; }

Assembly: AWSSDK (Module: AWSSDK) Version: 1.5.60.0 (1.5.60.0)