SVCUTIL /CT:System.Collections.Generic.ObservableCollection not working

Question

Attempting to include the "/ct:System.Collections.Generic.ObservableCollection`1" for my cmd line but it isn't acceting it.

The Error: No type could be loaded for the value System.Collections.Generic.ObservableCollection`1 passed to the /collectionType option.

I've added the NuGet package for the System.ObjectModel but when it installs, the .Net45 folder has a single zero byte file in it and it's not the "System.ObjectModel.dll". Where should I find this DLL?

Answer 1

Hi @InspiredUser33157 ,
You can download System.ObjectModel.dll from the link below.
https://www.nuget.org/packages/System.ObjectModel
There is no DLL file, the downloaded package is in the packages.config folder.
You can refer to the following command:
svcutil http://MyWebweb.MyDomain.com/BrokerWcf.svc /r:"C:\Windows\Microsoft.NET\Framework64\v2.0.50727\System.dll" /ct:System.Collections.Generic.ObservableCollection`1
I suggest you can take a look at the documentation:
https://learn.microsoft.com/en-us/dotnet/framework/wcf/servicemodel-metadata-utility-tool-svcutil-exe
Best regards,
Lan Huang

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Answer 2

I've installed the NuGet package and changed the \r: path to your suggestion but still getting the same error:

"Error: No type could be loaded for the value System.Collections.ObjectModel.ObservableCollection'1 passed to the /collectionType option. Ensure that the assembly this type belongs to is specified via the /reference option."

My complete cmd line is :

svcutil http://MyWeb.csitgroup.com/BrokerWcf.svc /Language=c# /t:Code /out:"C:\Users\csalerno\Projects\MyWeb 3.x\MyWeb v3.x\MyWeb.Setup\Service References\BrokerWcfSvc\Reference.cs" /config:"C:\Users\csalerno\Projects\MyWeb 3.x\MyWeb v3.x\MyWeb.Setup\Service References\BrokerWcfSvc\ServiceProxy.config" /async /namespace:"*,MyWeb.Setup.BrokerWcfSvc" /tcv:Version35 /ct:System.Collections.ObjectModel.ObservableCollection /r:"C:\Windows\Microsoft.NET\Framework\v4.0.30319\System.dll"

Should the \tcv: be set to Version4.5.2?

Answer 3

I continued to play with the cmd line params and finally worked the error out with the following cmd line, but having an issue with using the correct Class.

svcutil http://localhost:61394/BrokerWcf.svc /Language=c# /t:Code /out:"C:\Users\csalerno\Projects\MyWeb 3.x\MyWeb v3.x\MyWeb.Setup\Service References\BrokerWcfSvc\Reference.cs" /config:"C:\Users\csalerno\Projects\MyWeb 3.x\MyWeb v3.x\MyWeb.Setup\Service References\BrokerWcfSvc\ServiceProxy.config" /async /namespace:"*,MyWeb.Setup.BrokerWcfSvc" /tcv:Version35 /ct:System.Collections.ObjectModel.ObservableCollection`1 /r:"C:\Windows\Microsoft.NET\Framework\v4.0.30319\System.ObjectModel.dll"

But getting this one last error:
Severity Code Description Project File Line Suppression State
Error CS0029 Cannot implicitly convert type 'System.Collections.ObjectModel.ObservableCollection<MyWeb.Setup.BrokerWcfSvc.Broker>' to 'System.Collections.ObjectModel.ObservableCollection<DTP.Data.Broker>' MyWeb.Setup C:\Users\csalerno\Projects\MyWeb 3.x\MyWeb v3.x\MyWeb.Setup\ViewModels\BrokerViewModel.cs 277 Active

The "DTP.Data.Broker" is in another DLL and I found no examples of adding multiple DLL references to the /r: parameter. Is this what is missing? Why is it trying to use "MyWeb.Setup.BrokerWcfSvc.Broker" instead of the correct "DTP.Data.Broker"?

Answer 4

Looks like you can simple add another "/r:" switch to include another DLL Reference.

svcutil http://localhost:61394/BrokerWcf.svc /Language=c# /t:Code /out:"C:\Users\csalerno\Projects\MyWeb 3.x\MyWeb v3.x\MyWeb.Setup\Service References\BrokerWcfSvc\Reference.cs" /config:"C:\Users\csalerno\Projects\MyWeb 3.x\MyWeb v3.x\MyWeb.Setup\Service References\BrokerWcfSvc\ServiceProxy.config" /async /namespace:"*,MyWeb.Setup.BrokerWcfSvc" /tcv:Version35 /ct:System.Collections.ObjectModel.ObservableCollection`1 /r:"C:\Windows\Microsoft.NET\Framework\v4.0.30319\System.ObjectModel.dll" /r:c:\MyDLL.dll

No it builds successfully.