AWS SDK for .NET Documentation
Description Property
AmazonAmazon.EC2.ModelRegisterImageRequestDescription Did this page help you?   Yes   No    Tell us about it...
The description of the AMI.
Declaration Syntax
C#
public string Description { get; set; }
Remarks
Must be 3-128 alphanumeric characters, parenthesis (()), commas (,), slashes (/), dashes (-), or underscores(_).

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