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Hi Igor, great to see you here! `SecurityRule` is a resource while `SecurityRuleArgs` is its input type, they aren’t the same thing. When building a list of args, you should pass args objects. E.g. this will compile:
```var ruleArgs1 = new Pulumi.AzureNextGen.Network.Latest.SecurityRuleArgs
{
    SecurityRuleName = "RDP_3389",
    //...
};
var ruleArgs2 = new Pulumi.AzureNextGen.Network.Latest.SecurityRuleArgs
{
    SecurityRuleName = "Port_6516",
    //...
};
var securityRules = new List&lt;Pulumi.AzureNextGen.Network.Latest.SecurityRuleArgs&gt; { ruleArgs1, ruleArgs2 };```

ok, so no need to create rules to get that list for NSG?

Azure’s Network resource provider is designed somewhat confusingly. You can either set rules inside the property of NSG or define them as separate resources. If you go for the former option, you only need `args`. If you choose the latter, you create several `SecurityRule` resources but do not pass them to NSG.

Off the top of my head, I do not know the limitations of each approach.

I don't see how those rules will get proper names then :slightly_smiling_face:, will try and see

You can set `Name` in both cases, can’t you?

had to rewrite that piece:
`var rule1Args = new Pulumi.AzureNextGen.Network.Latest.Inputs.SecurityRuleArgs`
        {
            Access = "Allow", //Deny, Allow
            //...
        };

        var rule2Args = new Pulumi.AzureNextGen.Network.Latest.Inputs.SecurityRuleArgs
        {
            Access = "Allow", //Deny, Allow
            //...
        };

        var securityRulesArgs = new List&lt;Pulumi.AzureNextGen.Network.Latest.Inputs.SecurityRuleArgs&gt; { rule1Args, rule2Args };

        var nsg = new NetworkSecurityGroup("nsg", new Pulumi.AzureNextGen.Network.Latest.NetworkSecurityGroupArgs
        {
            Location = _resourceGroup.Location,
            ResourceGroupName = _resourceGroup.Name,
            NetworkSecurityGroupName = "nsg",
            SecurityRules = securityRulesArgs,
        });

and when I make Args as Inputs they can't have names

```var rule2Args = new Pulumi.AzureNextGen.Network.Latest.Inputs.SecurityRuleArgs
{
    Access = "Allow", //Deny, Allow
    Name = "myrule",
    //...
};```

right, now it worked, before VSCode was complaining...