The user data to make available to the launched Amazon EC2 instances. For more information about Amazon EC2 user data, see 
User Data
            Retrieval in the 
Amazon Elastic Compute Cloud User Guide. 
|  Note: | 
|---|
| At this time, Auto Scaling launch configurations don't support
            compressed (e.g. zipped) user data files. | 
Constraints:
- Length
- 0 - 21847
- Pattern
- [\u0020-\uD7FF\uE000-\uFFFD\uD800\uDC00-\uDBFF\uDFFF\r\n\t]*

 Declaration Syntax
public string UserData { get; set; }Assembly: 
AWSSDK (Module: AWSSDK) Version: 1.5.60.0 (1.5.60.0)