Finishes the asynchronous execution of the PromoteReadReplica operation.
            
 Declaration Syntax
 Declaration Syntax| C# | 
public PromoteReadReplicaResponse EndPromoteReadReplica( IAsyncResult asyncResult )
 Parameters
 Parameters- asyncResult (IAsyncResult)
- The IAsyncResult returned by the call to BeginPromoteReadReplica.
 Return Value
 Return ValueReturns a DBInstance from AmazonRDS.