The AuthorizeCacheSecurityGroupIngress operation allows network ingress to a cache security group. Applications using ElastiCache must be running on Amazon EC2, and Amazon EC2 security groups are used as the authorization mechanism.
NOTE: You cannot authorize ingress from an Amazon EC2 security group in one Region to an ElastiCache cluster in another Region.
 Declaration Syntax
 Declaration Syntax| C# | 
AuthorizeCacheSecurityGroupIngressResponse AuthorizeCacheSecurityGroupIngress( AuthorizeCacheSecurityGroupIngressRequest authorizeCacheSecurityGroupIngressRequest )
 Parameters
 Parameters- authorizeCacheSecurityGroupIngressRequest (AuthorizeCacheSecurityGroupIngressRequest)
- Container for the necessary parameters to execute the AuthorizeCacheSecurityGroupIngress service method on AmazonElastiCache.
 Return Value
 Return ValueThe response from the AuthorizeCacheSecurityGroupIngress service method, as returned by AmazonElastiCache.
 Exceptions
 Exceptions