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# general
s
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b
Hey, your 
Main()
method should look like this:
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static Task Main()
    {
        var serviceCollection = new ServiceCollection();
        var serviceProvider = serviceCollection
                                .AddSingleton<MyStack>()
                                .BuildServiceProvider();

        return Deployment.RunAsync<MyStack>(serviceProvider);
    }
So you're not registering 
Stack
in thesingleton, just 
MyStack
👍 1
b
^. The 
Deployment
is trying to resolve for 
MyStack
which you provided via 
RunAsync<MyStack>
but you only have it registered as 
Stack
Also note that if this is just a trivial example and in practice you will be running multiple deployments against the same 
IServiceProvider
than you will want to make sure that it is registered as 
Transient
instead of 
Singleton
. Pulumi relies on the stack actually being instantiated within the deployment so if you run multiple deployments against the same service provider instance than only the first deployment will actually work when it is registered as singleton. But if you're actually just running it as a console application in practice, like your example, than singleton will suffice.
💯 1
b
also make sure your Main returns 
Task<int>
or you can get into some trouble if your stack throws any exceptions: https://github.com/pulumi/pulumi/issues/7050#issuecomment-851580328
☝️ 1
w
I'm running a console app but with multiple passes for preview then update. Use a transient lifetime. https://github.com/gitfool/Pulumi.Dungeon/blob/master/Cli/HostBuilderExtensions.cs#L43
b
@brave-planet-10645 Thank you so much! That worked perfectly.
Thank you @bored-oyster-3147 and @bumpy-grass-54508 for your tips on improving this as well 😄
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