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To create a security group for EC2-Classic

Create and initialize a CreateSecurityGroupRequest object. Assign a name and description to the

GroupName and Description properties, respectively.

The CreateSecurityGroup method returns a CreateSecurityGroupResponse object.You can get the ID

of the new security group from the response and then use DescribeSecurityGroups with the security

group ID to get the SecurityGroup object for the security group.

if (mySG == null)

{

var newSGRequest = new CreateSecurityGroupRequest()

{

GroupName = secGroupName,

Description = "My sample security group for EC2-Classic"

};

var csgResponse = ec2Client.CreateSecurityGroup(newSGRequest);

Console.WriteLine();

Console.WriteLine("New security group: " + csgResponse.GroupId);

List<string> Groups = new List<string>() { csgResponse.GroupId };

var newSgRequest = new DescribeSecurityGroupsRequest() { GroupIds = Groups

};

var newSgResponse = ec2Client.DescribeSecurityGroups(newSgRequest);

mySG = newSgResponse.SecurityGroups[0];

}

To create a security group for EC2-VPC

Create and initialize a CreateSecurityGroupRequest object. Assign values to the GroupName, Description,

and VpcId properties.