The EC2 Availability Zone (AZ) in which you want Amazon Redshift to provision the cluster. For example, if you have several EC2 instances running in a specific Availability Zone, then you might want the cluster to be provisioned in the same zone in order to decrease network latency.
Default: A random, system-chosen Availability Zone in the region that is specified by the endpoint.
Example: 
CopyC#us-east-1d
Constraint: The specified Availability Zone must be in the same region as the current endpoint.
Declaration Syntax| C# |
public string AvailabilityZone { get; set; }