UnassignPrivateIpAddressesResponse

This example unassigns the specified private IP address from the specified network interface.

To unassign a secondary private IP address from a network interface

var client = new AmazonEC2Client();
var response = client.UnassignPrivateIpAddresses(new UnassignPrivateIpAddressesRequest 
{
    NetworkInterfaceId = "eni-e5aa89a3",
    PrivateIpAddresses = new List<string> {
        "10.0.0.82"
    }
});