Unable to Deserialize - "Dynamic code generation is not supported on this platform." when using Windows Runtime Component with Javascript UWP PWA

Pramod Garikapati 1

Hi Team,

We are trying to convert a PWA application into UWP application and we are using windows runtime component which in turn uses Net Standard 2.0 component. In the Net Standard 2.0 component when we use "JsonConvert.DeserializeObject" from Newtonsoft, we are getting error "Dynamic code generation is not supported on this platform." where as the same is working with regular windows universal application.

Sample project to reproduce the scenario is at https://1drv.ms/u/s!AiRUJ-H3vDEwgYgaz-Ad_q8QiBmpYw?e=7BIKVc

Can someone look into this and advice us please.

Fay Wang - MSFT 5,196 Reputation points

2020-06-17T06:05:05.19+00:00

May I know why do you try to use c# method to convert data? Since in js, it also has the conversion method(e.g. JSON.parse(), etc.).
Pramod Garikapati 1 Reputation point

2020-06-17T08:39:54.133+00:00

Hi FayWang,

We are executing a network call in Net Standard 2.0 library which in turn gets data (json) and we need to parse the data and store into a db. We are not doing anything in js and this Net Standard library is a big project which was developed sometime ago and we still are using this in our traditional UWP-xaml approach which is working seamlessly.

What we are trying to achieve now is convert PWA into a UWP and for that we are using this js -> Winmd -> Net Standard 2.0 and in this approach we are facing the above mentioned problem.

Please suggest if we are doing anything wrong.
Fay Wang - MSFT 5,196 Reputation points

2020-06-18T07:42:46.967+00:00

When I created a c# uwp app as main program, the Newtonsoft worked well and didn't throw such exception. I'm not sure what caused this issue if the PWA app as main program, I will confirm with the team.
Pramod Garikapati 1 Reputation point

2020-06-18T07:46:58.937+00:00

It worked for me too in c# uwp and that's why we wanted to use the same Net Standard 2.0 libraries in the PWA to UWP conversion too as these libraries already have lot of code written into them.

Can you please check with the team and reply at the earliest as we are stuck with this problem and rest of the other code is working fine and we can't go live.
Fay Wang - MSFT 5,196 Reputation points

2020-06-18T09:39:10.503+00:00

If there is any progress, I will update here.

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Unable to Deserialize - "Dynamic code generation is not supported on this platform." when using Windows Runtime Component with Javascript UWP PWA