AWS SDK for .NET Documentation
Name Property
AmazonAmazon.SimpleWorkflow.ModelRegisterActivityTypeRequestName Did this page help you?   Yes   No    Tell us about it...
The name of the activity type 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 - 256

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

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