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could you please telle me why if I set a config with "pulumi config set sql:username" in one stack then when I try to retrieve it from Program.cs the error is "Missing Required configuration variable ProjectName:sql:username" ?

What does your code look like for accessing it?

var sqlusername = config.Require("sql:username");
var sqlpassword = config.RequireSecret("sql:password");

I don't know why it tries to concatenate also the project name to find the configuration...

When you create the `Config` class, it uses the Project name as the namespace...

If you want to access a different namespace, you'll have to instantiate a new instance of `Config` ...

no I don't pass the parameter, ad so it means by default I think

```var sqlconfig = new Config("sql");
var sqlusername = sqlconfig.Require("username");```

ok so it means that if I have different namespaces in the same stack I need to instantiate different Config to be able to retrieve what i need, correct?