private static SecurityGroup GetDefaultSecurityGroup(IAmazonEC2 ec2Client, string vpcId)
{
var filters = new List<Filter>()
{
new Filter() { Name = "vpc-id", Values = new List<string>() { vpcId } },
new Filter() { Name = "group-name", Values = new List<string>() { "default" } }
};
var response = ec2Client.DescribeSecurityGroups(new DescribeSecurityGroupsRequest() { Filters = filters });
if (response.SecurityGroups.Count != 1)
return null;
return response.SecurityGroups[0];
}