A specific DB snapshot identifier to describe. Cannot be used in conjunction with DBInstanceIdentifier. This value is stored as a
            lowercase string. Constraints: 
- Must be 1 to 255 alphanumeric characters
- First character must be a letter
- Cannot end with a hyphen or contain two consecutive hyphens
- If this is the identifier of an automated snapshot, the SnapshotType parameter must also be specified.
 Declaration Syntax
 Declaration Syntax| C# | 
public string DBSnapshotIdentifier { get; set; }