AWS SDK for .NET Documentation
Version Property
AmazonAmazon.SimpleWorkflow.ModelRegisterActivityTypeRequestVersion Did this page help you?   Yes   No    Tell us about it...
The version of the activity type.
Note:
The activity type consists of the name and version, the combination of which must be unique within the domain.
The specified string must not start or end with whitespace. It must not contain a : (colon), / (slash), | (vertical bar), or any control characters (\u0000-\u001f | \u007f - \u009f). Also, it must not contain the literal string "arn".

Constraints:

Length
1 - 64

Declaration Syntax
C#
public string Version { get; set; }

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