Are you encountering the “System.Security.Permissions” error when using JsonConvert.DeserializeObject<T> in your .NET Core 2.0 project? Don’t worry, you’re not alone. In this article, we’ll explore the causes of this issue and provide you with effective solutions to resolve it.
Understanding the Problem
The “System.Security.Permissions” error typically occurs when you try to deserialize an incoming string into an object using the JsonConvert.DeserializeObject<T> method in .NET Core 2.0. This issue is more prevalent in .NET Core 2.0 compared to the full .NET framework.
Investigating the Exception
When you encounter this error, you might see the following exception message:
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Could not load file or assembly 'System.Security.Permissions, Version=4.0.0.0, Culture=neutral, PublicKeyToken=cc7b13ffcd2ddd51'. The system cannot find the file specified.
Causes of the Error
The root cause of the “System.Security.Permissions” error lies in the dependencies and versions of packages used in your project. It could be related to compatibility issues between the Newtonsoft.Json library (Json.NET) and the .NET Core 2.0 framework.
Solution: Update Newtonsoft.Json Package
To resolve the “System.Security.Permissions” error, you can try updating the Newtonsoft.Json package to the latest version. By doing so, you can ensure compatibility with the .NET Core 2.0 framework and potentially fix the issue.
Here are the steps to update the Newtonsoft.Json package in your project:
- Right-click on your project in Visual Studio and select “Manage NuGet Packages…”
- In the NuGet Package Manager window, navigate to the “Installed” tab.
- Search for “Newtonsoft.Json” in the search box.
- Select the Newtonsoft.Json package and click on the “Update” button to install the latest version.
- After the update is complete, rebuild your project to ensure the changes take effect.
Verify and Test
Once you’ve updated the Newtonsoft.Json package, it’s essential to verify that the “System.Security.Permissions” error no longer occurs. Test your code by deserializing the incoming string into an object using the JsonConvert.DeserializeObject<T> method. If the error has been resolved, you can proceed with confidence knowing that your code is functioning correctly.
Conclusion
The “System.Security.Permissions” error when invoking JsonConvert.DeserializeObject<T> in .NET Core 2.0 can be frustrating, but with the right approach, you can overcome it. By updating the Newtonsoft.Json package to the latest version, you can ensure compatibility and resolve the issue. Remember to keep your packages up to date to avoid similar errors in the future.
