The EC2 Availability Zone that the database instance will be created in. Default: A random, system-chosen Availability Zone in the
            endpoint's region. Example: us-east-1d Constraint: The AvailabilityZone parameter cannot be specified if the MultiAZ parameter is set
            to true. The specified Availability Zone must be in the same region as the current endpoint.
             
            
 Declaration Syntax
 Declaration Syntax| C# | 
public string AvailabilityZone { get; set; }