Looking for an example on how to use the VirtualMachineExtension in C#, Azure Native.

new AzureNative.Compute.VirtualMachineExtension($"{vmName}​-VMExtensions", new AzureNative.Compute.VirtualMachineExtensionArgs()
            {
                VmName = vmName,
                ResourceGroupName = resourceGroup.Name,
                AutoUpgradeMinorVersion = true,
                Publisher = "Microsoft.Powershell",
                Type = "DSC",
                TypeHandlerVersion = "2.73",
                Settings = Output.Tuple(hostPool.Name, hostPool.RegistrationInfo).Apply((tuple) =>
                {
                    return JsonConvert.SerializeObject(new
                    {
                        modulesUrl = "<https://storageblobname.blob.core.windows.net/galleryartifacts/Configuration_5-5-2021.zip>",
                        configurationFunction = "Configuration.ps1\\AddSessionHost",
                        properties = new
                        {
                            hostPoolName = tuple.Item1,
                            registrationInfoToken = tuple.Item2.Token,
                            aadJoin = false,
                        }
                    }​);
                })
            }​);

which results in this error:

error: azure-native:compute:VirtualMachineExtension resource 'somename-vm-01-VMExtensions' has a problem: 'settings' should be of type '' but got a string

although the documentation says about the settings property:

Json formatted public settings for the extension.

I verified that the string that I am using for the settings property has the exact syntax as when I export the VirtualMachineExtension from the Azure Portal. Looking documentation or an example on how to use the VirtualMachineExtension for DSC extension. Can't find an example anywhere using my Google Fu.