Gets and sets the property ClusterSubnetGroupName. 
            
The name for the subnet group. Amazon Redshift stores the value as a lowercase string.
Constraints:
- Must contain no more than 255 alphanumeric characters or hyphens.
- Must not be "Default".
- Must be unique for all subnet groups that are created by your AWS account.
            Example:  CopyC#
CopyC#examplesubnetgroup
 Declaration Syntax
 Declaration Syntax| C# | 
public string ClusterSubnetGroupName { get; set; }