A list of mappings that specify how block devices are exposed to the instance. Each mapping is made up of a VirtualName, a
            DeviceName, and an ebs data structure that contains information about the associated Elastic Block Storage volume. For more
            information about Amazon EC2 BlockDeviceMappings, go to  Block Device Mapping in the
            Amazon EC2 product documentation.
             
            
 Declaration Syntax
 Declaration Syntax| C# | 
public List<BlockDeviceMapping> BlockDeviceMappings { get; set; }