The subnet identifier for the Amazon VPC connection, if applicable. You can specify several subnets in a comma-separated list. When you
            specify VPCZoneIdentifier with AvailabilityZones, ensure that the subnets' Availability Zones match the values you specify for
            AvailabilityZones.
             
            
Constraints:
 Declaration Syntax
 Declaration Syntax| C# | 
public string VPCZoneIdentifier { get; set; }