Lists Availability Zones that are currently
            available to the account and their states.
            
 Declaration Syntax
 Declaration Syntax| C# | 
public DescribeAvailabilityZonesResponse DescribeAvailabilityZones( DescribeAvailabilityZonesRequest request )
 Parameters
 Parameters- request (DescribeAvailabilityZonesRequest)
- Describe Availability Zones request
 Return Value
 Return ValueDescribe Availability Zones  Response from the service
 Remarks
 Remarks
            Availability Zones are not the same across accounts.
            The Availability Zone us-east-1a for account A is not
            necessarily the same as us-east-1a for account B.
            Zone assignments are mapped independently for each account.
            
 Exceptions
 Exceptions| Exception | Condition | 
|---|---|
| WebException | |
| AmazonEC2Exception |