I am using .NET Framework 4.5 and I'm having this issue.
`The type or namespace 'Json' does not exist in the namespace 'System'`

I tried to `Install-Package System.Json -Version 4.0.20126.16343` but I had this issue afterwards.

```none
The type 'System.Uri' is defined in an assembly that is not referenced. You must add a reference to assembly 'System, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089'

```

Source: <https://www.nuget.org/packages/System.Json>

Any ideas would be really appreciated!